12 Jan is in January.
Before 12 Jan 1027 Thierry Ardennes I Duke Lower Lorraine (age 62) died. His son Frederick Ardennes II Duke Lower Lorraine succeeded II Duke Lower Lorraine.
On 12 Jan 1072 Sancho "Strong" II King Leon II King Castile (age 35) was crowned II King Leon.
On 12 Jan 1297 Thomas de Multon 1st Baron Multon (age 20) and Eleanor Burgh Baroness Multon Egremont (age 15) were married. She the daughter of Richard "Red Earl" Burgh 2nd Earl Ulster (age 38) and Margaret Burgh Countess Ulster.
On 12 Jan 1372 Walter Manny 1st Baron Manny (age 62) died. His daughter Anne Manny Countess Pembroke succeeded 2nd Baroness Manny. John Hastings 2nd Earl Pembroke (age 24) by marriage Baron Manny.
On 12 Jan 1400 Thomas Blount (age 48) was hanged at Oxford [Map] by Thomas Erpingham (age 45).
On 12 Jan 1405 Eleanor Maltravers 2nd Baroness Maltravers Baroness Arundel and Cobham (age 60) died at Sussex. She was buried at Lewes Priory [Map]. Her grandson John Fitzalan 13th Earl Arundel (age 19) succeeded 3rd Baron Maltravers 1C 1330.
On 12 Jan 1412 John Mowbray 2nd Duke of Norfolk (age 20) and Katherine Neville Duchess Norfolk (age 12) were married. She the daughter of Ralph Neville 1st Earl of Westmoreland (age 48) and Joan Beaufort Countess of Westmoreland (age 33). He the son of Thomas Mowbray 1st Duke of Norfolk and Elizabeth Fitzalan Duchess Norfolk (age 46). They were fourth cousins. He a great x 3 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England. 
Before 12 Jan 1458 Richard Grey 3rd Earl Tankerville (age 21) and Margaret Tuchet Countess Tankerville (age 27) were married. She by marriage Countess Tankerville. He the son of Henry Grey 2nd Earl Tankerville and Antigone Lancaster Countess Tankerville. They were second cousin once removed. He a great grandson of Henry IV King England. She a great x 2 granddaughter of King Edward III of England. 
On 12 Jan 1491 a double wedding ceremony was held between the Este and Visconti families of Milan. Leonardo da Vinci orchestrated the celebrations.
Alfonso Este I Duke Modena (age 14) and Anne Sforza (age 14) were married fourteen years after their bethrothal.
Ludovico Sforza Duke Milan (age 38) and Beatrice Este (age 15) were married. The difference in their ages was 22 years.
On 12 Jan 1519 Maximilian Habsburg I Holy Roman Emperor (age 59) died. His grandson Charles V Holy Roman Emperor (age 18) succeeded V Holy Roman Emperor.
Henry Machyn's Diary. 12 Jan 1559. The xij day the Qwen('s) (age 25) grace toke her barge at Whytt-halle toward the Towre, and shott the bryge, and my lord mare (age 50) and the althermen, and all the craftes, in barges with stremars and baners of ther armes.
On 12 Jan 1560 Bishop John White (age 50) died.
On 12 Jan 1562 Charles Emmanuel Savoy I Duke Savoy was born to Emmanuel Philibert Duke of Savoy (age 33) and Margaret Valois Duchess Berry and Savoy (age 38). Coefficient of inbreeding 2.29%. 
Henry Machyn's Diary. 12 Jan 1563. [The xij day of January the Queen's second Parliament began to sit at Westminster, and the] lordes and byshopes rod in ther [parliament robes, and] the Quen('s) (age 29) grase in cremesun welvett, [and the earl of] Northumburland (age 35) bare the sword a-for the quen; [all the] haroldes of armes in ther cotte armurs, and all the trumpettes [blowing], and lythe at owre lade of Grace chapell, and they [went in]to the abbay, and ther was a sermon (by Nowell (age 46), dean of Saint Paul's.)
On 12 Jan 1573 William Howard 1st Baron Howard (age 63) died at Hampton Court Palace [Map]. He was buried at Reigate, Surrey [Map]. His son Charles Howard 1st Earl Nottingham (age 37) succeeded 2nd Baron Howard of Effingham. Katherine Carey Countess Nottingham (age 23) by marriage Baroness Howard of Effingham.NOTEXT
On 12 Jan 1635 Thomas Cornwall 12th Baron Burford (age 62) died. His son Gilbert Cornwall 13th Baron Burford (age 37) succeeded 13th Baron Burford.
Evelyn's Diary. 12 Jan 1662. At St. James's chapel preached, or rather harangued, the famous orator, Monsieur Morus, in French. There were present the King (age 31), Duke (age 28), French Ambassador, Lord Aubigny (age 42), Earl of Bristol (age 49), and a world of Roman Catholics, drawn thither to hear this eloquent Protestant.
On 12 Jan 1665 Fulke Greville 5th Baron Brooke (age 21) and Sarah Dashwood Baroness Brooke (age 19) were married at St Bartholomew the Less.
On 12 Jan 1675 Henry Hamilton 2nd Earl Clanbrassil (age 28) died.
On 12 Jan 1676 Henry Moore 1st Earl Drogheda (age 54) died. His son Charles Moore 2nd Earl Drogheda succeeded 2nd Earl Drogheda, 4th Viscount Moore of Drogheda, 4th Baron Moore of Mellefont in Louth. Letitia Robartes Countess Drogheda (age 26) by marriage Countess Drogheda.
Evelyn's Diary. 12 Jan 1690. The Parliament was unexpectedly prorogued to 2d of April to the discontent and surprise of many members who, being exceedingly averse to the settling of anything, proceeding with animosities, multiplying exceptions against those whom they pronounced obnoxious, and producing as universal a discontent against King William (age 39) and themselves, as there was before against King James (age 56). The new King (age 39) resolved on an expedition into Ireland in person. About 150 of the members who were of the more royal party, meeting at a feast at the Apollo Tavern [Map] near St. Dunstan's [Map], sent some of their company to the King (age 39), to assure him of their service; he returned his thanks, advising them to repair to their several counties and preserve the peace during his absence, and assuring them that he would be steady to his resolution of defending the Laws and Religion established. The great Lord suspected to have counselled this prorogation, universally denied it. However, it was believed the chief adviser was the Marquis of Carmarthen (age 57), who now seemed to be most in favor.
John Ashton Edmund Elliot Richard Graham 1691. On Fryday, the 2d day of this Sessions, my Lord Preston (age 41), John Ashton and Edmund Elliot, were all Arrained for High Treason, my Lord Preston (age 41) was Tryed on Saturday by the name of Sir Richard Graham, Mr. Ashton on Monday. The Indictments against them consisted of Two Parts, the First of which set forth, That they had a Treasonable Design carrying on to Depose the King and Queen, and to Subvert and Alter the Government of the Kingdom of England, and to raise War and Rebellion in the same; which said Traiterous and Wicked Designs and Purposes to bring to pass, they did, on the 29th of December last, Meet and Conspire together, with several other Traitors not yet discovered, and did Compose several Treasonable Letters, Notes and Memorandums in writing, which set forth the most effectual way and means how they might Dethrone and Depose our Most Gracious Sovereign Lord and Lady the King (age 40) and Queen (age 28), and further describing therein how the Affairs of this Kingdom stood, and of what Strength and Force our Shipping was; as also the Fortifications of several Sea-Port-Towns within this Kingdom. The Second Part was their adhering to the Kings's Enemies: And to that end, that they might Acquaint Lewis the French King of the same, they did hire a Boat and Embarque themselves in order to Transport themselves and Pacquet of Treasonable Letters into France, agreeing to pay for their said Passages the Sum of One hundred Pound; and, in order to their Treasonable Voyage, they had made their Passage as far as below Gravesend [Map], but were then Taken by Captain Billop, who Cruised abroad to search for them.
After this the Evidence for the King (age 40) being called, gave an Account particularly from Step to Step, how cunningly and subtilly they managed this horrid Conspiracy, by hiring the Smack called the Thomas and Elizabeth, to convey them secretly into France; in order to which they took Water in a Skuller at Surrey-Stairs, and went on Board the aforesaid Vessel, which lay in the River of Thames over against the Tower [Map]: From thence they set Sail down the River, till coming within the View of the George Frigate, lying in Long-reach, they desired the Master of the Smack to hide them under the Quarter-Hatches; which was done, they having some Fear of being discovered: There they remained till past that Danger, and then came up; but when they were within Sight of Gravesend [Map] they hid again, and a little below it Captain Billop came aboard them, under Pretence of Pressing the Masters two Men, who were assistants to him; but indeed his Design and real Intention was to find out those Traytors, which, upon Search, he found lying along under the Hatches; and after their being haled up he search'd them, and found a Pacquet of Treasonable Papers in Mr. Ashton's Bosom: which he with the Prisoners carried before my Lord Nottingham; who examined the Papers, and after being examined by the Cabinet Council they were committed to the Tower. The Evidence was very full and plain against them both, much to the same effect and purport: The Letters being also Read against them in Court, were adjudged to be of no less Import than High-Treason. Upon the whole they had nothing material to offer in their Defence; so after a very long hearing, they were both found Guilty of High Treason. Edmond Elliot was ordered to remain till further order.
On 12 Jan 1693 John Bellew 1st Baron Bellew died. He was buried at St Margaret's Church, Westminster [Map]. His son Walter Bellew 2nd Baron Bellew succeeded 2nd Baron Bellew of Duleek 1C 1686.
On 12 Jan 1694 Maximilian Wittelsbach II Elector Bavaria (age 31) and Theresa Kunegunda Sobieska (age 17) were married.
On 12 Jan 1697 Henry Nassau 1st Earl Grantham (age 24) and Henrietta Butler Countess Grantham were married. She the daughter of Thomas Butler 6th Earl Ossory and Emilia Nassau Beverweert Countess Ossory. They were half first cousins.
Before 12 Jan 1713. Godfrey Kneller (age 66). Portrait of John Vaughan 3rd Earl Carbery (age 73).
On 12 Jan 1713 John Vaughan 3rd Earl Carbery (age 73) died. Earl Carbery extinct.
On 12 Jan 1713 Robert Cotton 1st Baronet was buried at St Marcella's Church, Denbigh [Map] next to his wife Hester Salusbury.
Before 12 Jan 1721 John Campbell 4th Duke Argyll (age 28) and Mary Drummond Bellenden (age 36) were married.
On 12 Jan 1775 John Thomas (age 63) and Elizabeth Baldwin were married at Westminster Abbey [Map]. There was no issue.
On 12 Jan 1784 John Wandesford 1st Earl Wandesford (age 58) died. Earl Wandesford, Viscount Castlecomer, Baron Wandesford, Baronet Wandesford of Kirklington extinct.
On 12 Jan 1784 Bishop George Murray was born to Bishop George Murray (age 22).
On 12 Jan 1786 Thomas Barrett Lennard 17th Baron Dacre Gilsland (age 69) died. His nephew Charles Trevor Roper 18th Baron Dacre Gilsland (age 41) succeeded 18th Baron Dacre Gilsland 1C 1321.
On 12 Jan 1798 Joseph Damer 1st Earl Dorchester (age 79) died. His son George Damer 2nd Earl Dorchester (age 51) succeeded 2nd Earl Dorchester 2C 1792.
On 12 Jan 1800 George William Villiers 4th Earl Clarendon was born to George Villiers (age 40) and Theresa Parker (age 25).
On 12 Jan 1818 Charles Andrew Vanneck 3rd Baron Huntingfield was born to Joshua Vanneck 2nd Baron Huntingfield (age 39).
On 12 Jan 1822 Catherine Sarah Hamond (age 13) died. Grave slab in All Saints Church, West Acre [Map].
Catherine Sarah Hamond: Around 1809 he was born to Philip Hamond of High House in West Acre in Norfolk (age 27) and Anne Packe (age 32).
On 12 Jan 1826 Henry Villiers Stuart (age 22) and Theresia Pauline Ott were married at St James' Church, Spanish Place. He a great x 4 grandson of King Charles II of England Scotland and Ireland.
Before 12 Jan 1834. Thomas Phillips (age 63). Portrait of William Wyndham Granville 1st Baron Grenville (age 74).
William Wyndham Granville 1st Baron Grenville: On 25 Oct 1759 he was born to George Granville (age 47) and Elizabeth Wyndham (age 40). On 12 Jan 1834 William Wyndham Granville 1st Baron Grenville (age 74) died.
On 12 Jan 1848 Francis Stuart 10th Earl Moray (age 76) died. His son Francis Stuart 11th Earl Moray (age 53) succeeded 11th Earl Moray 5C 1562.
On 12 Jan 1851 Henry Pelham-Clinton 4th Duke Newcastle-under-Lyme (age 65) died. His son Henry Pelham-Clinton 5th Duke Newcastle-under-Lyme (age 39) succeeded 5th Duke Newcastle under Lyme, 12th Earl Lincoln 8C 1572. Susan Harriet Catherine Hamilton Duchess Newcastle under Lyne (age 36) by marriage Duchess Newcastle under Lyme. Monument in the Milton Mausoleum Markham Clinton [Map].
Susan Harriet Catherine Hamilton Duchess Newcastle under Lyne: On 09 Jun 1814 she was born to Alexander Hamilton 10th Duke Hamilton 7th Duke Brandon (age 46) and Susanna Euphemia Beckford Duchess Hamilton Duchess Brandon (age 28). On 27 Nov 1832 Henry Pelham-Clinton 5th Duke Newcastle-under-Lyme (age 21) and Susan Harriet Catherine Hamilton Duchess Newcastle under Lyne (age 18) were married. She the daughter of Alexander Hamilton 10th Duke Hamilton 7th Duke Brandon (age 65) and Susanna Euphemia Beckford Duchess Hamilton Duchess Brandon (age 46). He the son of Henry Pelham-Clinton 4th Duke Newcastle-under-Lyme (age 47) and Georgiana Elizabeth Miller Mundy Duchess Newcastle under Lyne. He a great x 4 grandson of King Charles II of England Scotland and Ireland. On 28 Nov 1889 Susan Harriet Catherine Hamilton Duchess Newcastle under Lyne (age 75) died.
On 12 Jan 1858 Robert Offley Ashburton Crewe Milnes 1st Marquess of Crewe was born to Robert Moncton Milnes 1st Baron Houghton (age 48) and Annabella Hungerford Crewe (age 44) at 16 Upper Brook Street Mayfair.
On 12 Jan 1861 Randle Wilbraham (age 88) died. Memorial at All Saints Church, Old Rode sculpted by Albert-Ernest Carrier-Belleuse (age 36).
Randle Wilbraham: On 10 Jan 1773 he was born to Richard Wilbraham-Bootle (age 47). Before 10 Mar 1810 Randle Wilbraham (age 37) and Sybilla Ann Egerton (age 29) were married.
On 12 Jan 1865 William Horsley-Beresford 4th Baron Decies was born to William Horsley-Beresford 3rd Baron Decies (age 53) and Catherine Anne Dent Baroness Decies (age 25).
On 12 Jan 1884 Robert Nicholas Hamond (age 74) died. On 01 Mar 1893 his wife Sophia Caroline Musters (age 71) died.
On 13 Dec 1869 Anthony Hamond (age 65) died. On 31 Jan 1900 his wife Mary Anne Musters (age 77) died.
On 30 Mar 1895 Anthony Hamond (age 61) died.
Memorials in All Saints Church, West Acre [Map].
On 12 Jan 1887 Stafford Henry Northcote 1st Earl Iddesleigh (age 68) died at 10 Downing Street, Westminster [Map]. His son Walter Stafford Northcote 2nd Earl Iddesleigh (age 41) succeeded 2nd Earl of Iddesleigh in Devon, 2nd Viscount St Gyres of Newton St Gyres in Devon, 9th Baronet Northcote of Hayne in Devon
On 12 Jan 1891 Archibald Seymour 13th Duke Somerset (age 80) died. His brother Algernon St Maur 14th Duke Somerset (age 77) succeeded 14th Duke Somerset 4C 1547, 12th Baronet Seymour of Berry Pomeroy. Horatia Isabella Harriet Morier Duchess Somerset (age 71) by marriage Duchess Somerset.
On 12 Jan 1892 James Molyneux Caulfeild 3rd Earl Charlemont (age 71) died without issue. Earl of Charlemont, Viscount Charlemont in County Armagh, Baron Charlemont extinct.
On 12 Jan 1908 John Kemeys-Tynte 9th Baron Wharton was born to Charles Kemeys-Tynte 8th Baron Wharton (age 31).
On 12 Jan 1911 Montagu Samuel 1st Baron Swaythling (age 78) died. His son Louis Montagu 2nd Baron Swaythling (age 41) succeeded 2nd Baron Swaythling of Swaythling in Hampshire, 2nd Baronet Montagu of South Stoneham House in Hampshire and of Kensington Palace Gardens in London.
On 12 Jan 1933 Lawrence William Palk 3rd Baron Haldon (age 63) died. His son Lawrence Edward Broomfield Palk 4th Baron Haldon (age 36) succeeded 4th Baron Haldon of Haldon in Devon, 7th Baronet Palk of Haldon House in Devon.
On 12 Jan 1940 Charles Fitzroy 5th Baron Southampton (age 36) and Phyllis Joan Leslie Baroness Southampton were married. She by marriage Baroness Southampton.
On 12 Jan 1988 William Martin Alleyne Brownlow-Cecil 7th Marquess Exeter (age 78) died. His son Michael Cecil 8th Marquess of Exeter (age 52) succeeded 8th Marquess Exeter 2C 1801, 17th Earl Exeter, 18th Baron Burghley.
