03 Dec is in December.
1660 December Creation of Baronets and Peerages
1680 Trial and Execution of William Howard 1st Viscount Stafford
On 03 Dec 649 or 03 Dec 650 Bishop Birinus of Dorchester died.
On 03 Dec 1099 Osmund 1st Earl Dorset died. Earl Dorset 1C 1070 extinct.
After 03 Dec 1329 Gerard Lisle 1st Baron Lisle (age 25) and Eleanor Fitzalan (age 9) were married. She the daughter of Edmund Fitzalan 9th Earl Arundel and Alice Warenne Countess Arundel. She a great x 5 granddaughter of King John "Lackland" of England. 
On 03 Dec 1352 William Ros 3rd Baron Ros Helmsley (age 23) died. His brother Thomas Ros 4th Baron Ros Helmsley (age 17) succeeded 4th Baron Ros Helmsley and inherited Belvoir Castle [Map]. Beatrice Stafford Countess Desmond (age 11) by marriage Baroness Ros Helmsley.
On 03 Dec 1368 Charles "Beloved Mad" VI King France was born to King Charles V of France (age 30) and Joanna Bourbon Queen Consort France (age 30). Coefficient of inbreeding 3.59%. 
On 03 Dec 1382 Robert Poynings 4th Baron Poynings was born to Richard Poynings 3rd Baron Poynings (age 23) and Isabel Grey Baroness Poynings at Okeford Fitzpaine.
On 03 Dec 1403 Roger Scrope 2nd Baron Scrope of Bolton (age 34) died at Bolton. His son Richard Scrope 3rd Baron Scrope of Bolton (age 10) succeeded 3rd Baron Scrope of Bolton. Margaret Neville Baroness Scrope Bolton by marriage Baroness Scrope of Bolton.
Chronicle of Gregory 1431. 03 Dec 1431. Ande that yere the kyng (age 9) passyde the see in to Fraunce, and wente unto Parysse [Map]; and he come thedyr the thyrde day of Decembyr.
After 03 Dec 1542 John Plunkett 4th Baron Killeen (age 32) and Ellen Barnewall Baroness Killeen (age 29) were married. Ellen Barnewall Baroness Killeen by marriage Baroness Killeen. They were half third cousins.
Henry Machyn's Diary. 03 Dec 1556. The iij day of Desember cam rydyng from her plasse my lade Elizabeth('s) (age 23) grace, from Somersett place downe Fletstreet, and thrugh Old Bayle, and thrugh Smyth-field, with a grett compene; and her servandes alle in red gardyd with velvett; and so her grace toke her way toward Bysshope Atfeld [Map] plasse.
On 03 Dec 1585 Bishop Matthew Wren was born.
Before 03 Dec 1595 James Ley 1st Earl of Marlborough (age 43) and Mary Pettie were married.
On 03 Dec 1595 Henry Ley 2nd Earl of Marlborough was born to James Ley 1st Earl of Marlborough (age 43) and Mary Pettie.
On 03 Dec 1600 Roger North 2nd Baron North (age 70) died. His nephew Dudley North 3rd Baron North (age 18) succeeded 3rd Baron North.
In Dec 1660 King Charles II of England Scotland and Ireland (age 30) rewarded of further tranche of those who supported his Restoration by awarding them Baronetcies ...
On 03 Dec 1660 George Winn 1st Baronet (age 53) was created 1st Baronet Winn of Nostel in Yorkshire.
On 22 Dec 1660 John Keyt 1st Baronet (age 44) was created 1st Baronet Keyt of Ebrington in Gloucestershire for having raised a troop of horse to fight in the Royalist cause.
On 24 Dec 1660 William Frankland 1st Baronet (age 20) was created 1st Baronet Frankland of Thirkleby in Yorkshire.
On 03 Dec 1666 James Stewart 1st Duke Cambridge (age 3) was created 1st Duke Cambridge 1C 1664 by King James II of England Scotland and Ireland (age 33). See Samuel Pepys' Diary 1666 December 06.
Those present included King Charles II of England Scotland and Ireland (age 36), King James II of England Scotland and Ireland (age 33), Prince Rupert Palatinate Simmern 1st Duke Cumberland (age 46), William Cecil 2nd Earl Salisbury (age 75), George Monck 1st Duke Albemarle (age 57), Thomas Howard 1st Earl Berkshire (age 79), Charles Stewart 6th Duke Lennox 3rd Duke Richmond (age 27), Edward Montagu 2nd Earl Manchester (age 64), James Scott 1st Duke Monmouth 1st Duke Buccleuch (age 17).
NOTEXT
Pepy's Diary. 03 Dec 1666. So to bed, and with more cheerfulness than I have done a good while, to hear that for certain the Scott rebells are all routed; they having been so bold as to come within three miles of Edinburgh, and there given two or three repulses to the King's forces, but at last were mastered. Three or four hundred killed or taken, among which their leader, one Wallis, and seven ministers, they having all taken the Covenant a few days before, and sworn to live and die in it, as they did; and so all is likely to be there quiet again. There is also the very good newes come of four New-England ships come home safe to Falmouth, Cornwall with masts for the King (age 36); which is a blessing mighty unexpected, and without which, if for nothing else, we must have failed the next year. But God be praised for thus much good fortune, and send us the continuance of his favour in other things! So to bed.
On 03 Dec 1668 William Cecil 2nd Earl Salisbury (age 77) died. His grandson James Cecil 3rd Earl Salisbury (age 20) succeeded 3rd Earl Salisbury 5C 1605. Margaret Manners Countess of Salisbury by marriage Countess Salisbury.
Evelyn's Diary. 15 Nov 1678. The Queen's (age 39) birthday. I never saw the Court more brave, nor the nation in more apprehension and consternation. Coleman (age 42) and one Staly had now been tried, condemned, and executed. On this, Oates grew so presumptuous as to accuse the Queen (age 39) of intending to poison the King (age 48); which certainly that pious and virtuous lady abhorred the thoughts of, and Oates's circumstances made it utterly unlikely in my opinion. He probably thought to gratify some who would have been glad his Majesty (age 48) should have married a fruitful lady; but the King (age 48) was too kind a husband to let any of these make impression on him. However, divers of the Popish peers were sent to the Tower of London [Map], accused by Oates; and all the Roman Catholic lords were by a new Act forever excluded the Parliament; which was a mighty blow. the King's (age 48), Queen's, and Duke's servants, were banished, and a test to be taken by everybody who pretended to enjoy any office of public trust, and who would not be suspected of Popery. I went with Sir William Godolphin (age 38), a member of the Commons' House, to the Bishop of Ely (Dr. Peter Gunning (age 64)), to be resolved whether masses were idolatry, as the text expressed it, which was so worded, that several good Protestants scrupled, and Sir William, though a learned man and excellent divine himself, had some doubts about it. The Bishop's opinion was that he might take it, though he wished it had been otherwise worded in the text.
On 03 Dec 1678 Edward Colman Courtier (age 42) was hanged, drawn and quartered on a charge of treason having been implicated by Titus Oates (age 29).
Evelyn's Diary. 03 Dec 1680. The depositions of my Lord's (age 66) witnesses were taken, to invalidate the King's (age 50) witnesses; they were very slight persons, but, being fifteen or sixteen, they took up all that day, and in truth they rather did my Lord more injury than service.NOTEXT
On 03 Dec 1718 Webb Seymour 10th Duke Somerset was born to Edward Seymour 8th Duke Somerset (age 23) and Mary Webb Duchess Somerset (age 21).
On 03 Dec 1720 William Byron 4th Baron Byron (age 50) and Frances Berkeley Baroness Byron (age 17) were married. Frances Berkeley Baroness Byron by marriage Baroness Byron of Rochdale in Lancashire. His third marriage. Arranged by her father William Berkeley 4th Baron Berkeley (age 57) who described the age difference as being "disproportionate". The difference in their ages was 33 years.
On 03 Dec 1731 Jane Grey Benson (age 47) died. Monument in St Mary's Church, Fawsley [Map].
Jane Grey Benson: After 1651 Lucius Knightley and she were married. The difference in their ages was 33 years. In 1684 she was born to Henry Benson of Dodford and Elizabeth Grey.
On 03 Dec 1800 George de la Poer Beresford 1st Marquess Waterford (age 65) died. His son Henry de la Poer Beresford 2nd Marquess Waterford (age 28) succeeded 2nd Marquess Waterford.
Archaeologia Cambrensis 1908 Supplement 03 December 1802. 03 Dec 1802. Accompanied by a young farmer who procured a lanthorn for the purpose we walked nearly a mile to the south east of the church to the spot where in Mr. Rowlands' time there were two carnedds [Bryn Celli Ddu Burial Mound [Map]] remaining having two rude stone pillars placed between them but these stones have been employed for the purpose of building a wall near this place as well as a great part (fol. 45«) of the western carnedd which is nearly destroyed for the same purpose about twenty years ago when the labourers when digging towards the center discovered a flat pan about ten inches over-turned bottom upwards and under it a wedge of gold as they pretend the size of the heater of an iron with a piece of wire passing through the smaller end of it. The father of the young man who was with us happened to be one of the workmen employed at the time, but as what they found was immediately taken by Colonel Peacock the proprietor of the ground the man could give no further account of the circumstance. I should imagine that what they called the wedge of gold was no other than one of the brazen celts or sacrificial instruments used in former times which have been discovered in great numbers in Cornwall and (fol. 46) other parts of the kingdom. Whilst a farmer was removing some of the stones from the north east side of the larger carnedd to employ them in his repairs he came to the mouth of a passage covered with a square stone similar to that at Plas Newydd, anxious to reap the fruits of his discovery he procured a light and crept forward on his hands and knees along the dreary vault, when lo! in a chamber at the further end a figure in white seemed to forbid his approach. The poor man had scarcely power sufficient to crawl backwards out of this den of spirits as he imagined however in the course of a few days instigated by the hopes of riches and the presence of many assistants he made his second entré into the cavern and finding the white gentleman did not offer to stir he boldly went (fol. 46a) forward and discovered the object of his apprehensions was no other than a stone pillar about six feet in height standing in the centre of the chamber. His former consternation could now only be exceeded by his eagerness to see what was contained beneath the stone which he shortly overturned but treasure there was none, some large human bones lying near the pillar sufficiently testifying the purpose for which the structure was intended. This is the substance of the account we received fromn the younger man whose father was one of Colonel Peacock's labourers and on the premises at the time of the discovery. The superstition of the common people still suppose this to be the habitation of spirits.
Before 03 Dec 1817 John "Good Earl" Talbot 16th Earl of Shrewsbury (age 26) and Maria Theresa Talbot Countess Shrewsbury and Waterford were married.
On 03 Dec 1820 John Duke Coleridge 1st Baron Coleridge was born to John Taylor Coleridge (age 30) and Mary Buchanan (age 32).
On 03 Dec 1824 George William Fermor 5th Earl Pomfret was born to Thomas Fermor 4th Earl Pomfret (age 54).
On 03 Dec 1830 Frederick Leighton was born to Dr Frederic Septimus Leighton (age 31) at Scarborough [Map].
On 03 Dec 1837 Charles Douglas 6th Marquess Queensberry (age 60) died. His brother John Douglas 7th Marquess Queensberry (age 58) succeeded 7th Marquess Queensberry, 9th Earl Queensberry, 8th Lord Douglas Hawick, 6th Lord Drumlanrig, 6th Baronet Kelhead. Sarah Douglas Marchioness Queensbury by marriage Marchioness Queensberry.
On 03 Dec 1839 Frederick VI King Denmark and Norway (age 71) died.
On 03 Dec 1863 Dudley McGarel-Hogg 3rd Baron Magheramorne was born to James McGarel-Hogg 1st Baron Magheramorne (age 40) and Caroline Elizabeth Emma Douglas-Pennant.
On 03 Dec 1882 Bernhard II Duke of Saxe Meiningen (age 81) died. His son Georg II Duke of Saxe Meiningen (age 56) succeeded II Duke Saxe Meiningen.
On 03 Dec 1890 Thomas Fremantle 1st Baron Cottesloe (age 92) died. His son Thomas Fremantle 2nd Baron Cottesloe (age 60) succeeded 2nd Baron Cottesloe of Swanbourne and Hardwick in Buckinghamshire, 2nd Baronet Fremantle of Swanborne in Buckinghamshire. Augusta Scott by marriage Augusta Henrietta Scott Baroness Cottesloe.
On 03 Dec 1891 William Harry Hay 19th Earl Erroll (age 68) died. His son Charles Hay 20th Earl of Erroll (age 39) succeeded 20th Earl Erroll. Mary Caroline L'Estrange Countess of Erroll by marriage Countess Erroll.
On 03 Dec 1898 David Stuart Erskine 13th Earl of Buchan (age 83) died. His son Shipley Gordon Stuart Erskine 14th Earl Buchan (age 48) succeeded 14th Earl Buchan.
On 03 Dec 1918 John Percival Bishop (age 84) died. Monument sculpted by Allan Gairdner Wyon (age 36) in the Choir of Hereford Cathedral [Map].
On 03 Dec 1919 Thomas Grey 6th Baron Walsingham (age 76) died. His brother John Augustus Grey 7th Baron Walsingham (age 70) succeeded 7th Baron Walsingham of Walsingham in Norfolk.
On 03 Dec 1925 Robin Plunket 8th Baron Plunket was born to Terence Plunket 6th Baron Plunket (age 26) and Dorothé Mabel Lewis (age 25).
On 03 Dec 1946 Robert George Grosvenor 5th Duke Westminster (age 36) and Viola Maud Lyttelton Duchess Westminster (age 34) were married. They were second cousins.
On 03 Dec 1949 Anthony Robert Hugo Gerard 5th Baron Gerard was born to Major Rupert Charles Frederick Gerard.
On 03 Dec 1953 Charles Anthony Assheton Harbord-Hamond 12th Baron Suffield was born to Anthony Philip Harbord-Hamond 11th Baron Suffield (age 31).
On 03 Dec 1980 Oswald Mosley 6th Baronet (age 84) died. His son Nicholas Mosley 3rd Baron Ravensdale (age 57) succeeded 7th Baronet Mosley of Ancoats.