Half First Cousin is in Half-First Cousin Succession Heading.
Around 574 Conall mac Comgaill King of Dál Riata died. His half first cousin Áedán mac Gabráin King of Dál Riata (age 14) succeeded King of Dál Riata.
On 12 Oct 633 King Penda's alliance of Gwynedd and Mercia defeated the Northumbrians at the Battle of Hatfield Chase.
Eadfrith Deira was captured.
King Edwin of Northumbria (age 47) was killed. His half first cousin Osric King Deira succeeded King Deira. His nephew Eanfrith King Bernicia (age 43) succeeded King Bernicia.
Edwin's son Osfrith Deira was killed.
After 12 Oct 633Eadfrith Deira was killed. His half first cousin Eanfrith King Bernicia (age 43) succeeded King Bernicia.
In 709 King Coenred of Mercia Abdicated as King Mercia in favour of Ceolred King Mercia. His half first cousin Ceolred King Mercia succeeded King Mercia.
In 737 Ceolwulf King Northumbria Abdicated. His half first cousin Eadberht King of Northumbria succeeded King Northumbria.
In 900 Donald II King Alba died. His half first cousin Constantine II King Alba succeeded King Alba.
Around 25 Mar 1005 Kenneth III King Alba (age 39) died. His half first cousin King Malcolm II of Alba (age 51) succeeded King Alba.
In 1184 Simon Senlis 7th Earl Huntingdon 3rd Earl of Northampton (age 46) died. His half first cousin David Dunkeld 8th Earl Huntingdon (age 32) succeeded 8th Earl Huntingdon 1C 1065.
On 03 Jun 1253 Margaret Beaumont 7th Countess Warwick died. Her half first cousin William Maudit 8th Earl Warwick (age 33) succeeded 8th Earl Warwick 1C 1088. Alice Segrave Countess Warwick (age 21) by marriage Countess Warwick.
On 22 Sep 1629 Robert Radclyffe 5th Earl of Sussex (age 56) died at Clerkenwell [Map]. His first cousin once removed Edward Radclyffe 6th Earl of Sussex (age 70) succeeded 6th Earl of Sussex 2C 1529. His half first cousin Henry Mildmay 15th Baron Fitzwalter (age 44) de jure 15th Baron Fitzwalter 1C 1295.
In Jul 1657 Ulick Burke 1st Marquess Clanricarde (age 53) died. His half first cousin Richard Burke 6th Earl Clanricarde succeeded 6th Earl Clanricarde. Earl St Albans 1C 1628 extinct.
On 06 Aug 1666 William wheler 1st Baronet 1611-1666 (age 55) died. He was buried at All Saints Church, Derby [Map]. His half first cousin Charles Wheler 2nd Baronet (age 46) succeeded 2nd Baronet Wheler of the City of Westminster. Dorothy Bindlosse Lady Wheler (age 40) by marriage Lady Wheler of the City of Westminster.
In 1674 Thomas Dillon 5th Viscount Dillon died. His half first cousin Lucas Dillon 6th Viscount Dillon succeeded 6th Viscount Dillon of Costello Gallen in Mayo.
On 06 Mar 1685 Thomas Spencer 3rd Baronet (age 46) died of apoplexy. He was buried in the Spencer Chapel at Church of St Bartholomew, Yarnton. His half first cousin Thomas Spencer 4th Baronet succeeded 4th Baronet Spencer of Yarnton in Oxfordshire.
On 12 Sep 1685 Edmund Bacon 4th Baronet (age 52) died. His half first cousin Robert Bacon 5th Baronet (age 33) succeeded 5th Baronet Bacon of Redgrave in Suffolk.
In 1686 William Clifton 3rd Baronet (age 22) died. His half first cousin Gervase Clifton 4th Baronet (age 20) succeeded 4th Baronet Clifton of Clifton in Nottinghamshire.
On 21 Sep 1690 Wriothesley Baptist Noel 2nd Earl Gainsborough (age 29) died. His half first cousin Baptist Noel 3rd Earl Gainsborough (age 6) succeeded 3rd Earl Gainsborough 1C 1682, 6th Viscount Campden.
In 1692 Colonel Robert Carey 6th Baron Hunsdon (age 40) died. His half first cousin Robert Carey 7th Baron Hunsdon (age 43) succeeded 7th Baron Hunsdon 1C 1559.
On 10 Nov 1705 Alexander Bruce 3rd Earl Kincardine (age 39) died. His half first cousin Alexander Bruce 4th Earl Kincardine succeeded 4th Earl Kincardine.
On 18 Aug 1712 Richard Savage 4th Earl Rivers (age 58) died. His half first cousin John Savage 5th Earl Rivers (age 47) succeeded 5th Earl Rivers 2C 1626, 5th Viscount Colchester, 5th Viscount Savage, 5th Baron Darcy of Chiche, 6th Baronet Savage of Rocksavage in Cheshire.
On 16 Feb 1713 Walter Vavasour 3rd Baronet (age 69) died without issue. His half first cousin Walter Vavasour 4th Baronet (age 54) de jure 22nd Baron Vavasour, 4th Baronet Vavasour of Hazlewood in Yorkshire.
On 16 Sep 1720 Dudley Cullum 3rd Baronet (age 62) died. His half first cousin Jasper Cullum 4th Baronet (age 46) succeeded 4th Baronet Cullum of Hastede in Suffolk.
In 1735 William Spencer 6th Baronet died. His half first cousin Charles Spencer 7th Baronet succeeded 7th Baronet Spencer of Yarnton in Oxfordshire.
In 1737 Richard Dillon 9th Viscount Dillon died. His half first cousin Charles Dillon 10th Viscount Dillon succeeded 10th Viscount Dillon of Costello Gallen in Mayo. Frances Dillon Viscountess Dillon by marriage Viscountess Dillon of Costello Gallen in Mayo.
On 31 Dec 1738 Francis Clavering 5th Baronet (age 65) died. His half first cousin James Clavering 6th Baronet (age 58) succeeded 6th Baronet Clavering of Axwell in County Durham.
On 02 Jan 1741 Edward Littleton 3rd Baronet died. His half first cousin Edward Littleton 4th Baronet (age 14) succeeded 4th Baronet Littleton of Pillaton Hall.
On 16 Jun 1741 Edward Harley 2nd Earl of Oxford and Earl Mortimer (age 52) died. His half first cousin Edward Harley 3rd Earl of Oxford and Earl Mortimer (age 42) succeeded 3rd Earl of Oxford and Earl Mortimer. Martha Morgan Countess of Oxford and Mortimer (age 42) by marriage Countess of Oxford and Countess Mortimer.
In 1747 Robert Worsley 4th Baronet (age 77) died. His half first cousin James Worsley 5th Baronet (age 75) succeeded 5th Baronet Worsley of Appuldurcombe.
On 10 Mar 1759 Stewkley Schuckburgh 4th Baronet died unmarried. His half first cousin Charles Schuckburgh 5th Baronet (age 36) succeeded 5th Baronet Schuckburgh of Schuckburgh in Warwickshire.
In 1763 Walter Aston 7th Baronet (age 50) died. His half first cousin Walter Aston 8th Baronet (age 30) succeeded 8th Baronet Aston of Tixall.
On 24 Jun 1766 John Butler 15th Earl Ormonde died. His half first cousin Walter Butler 16th Earl Ormonde 9th Earl Ossory (age 63) de jure 16th Earl Ormonde, 9th Earl Ossory although he never used these titles.
In 1768 Robert Hicks 4th Baronet died. His half first cousin John Baptist Hicks 5th Baronet (age 47) succeeded 5th Baronet Hicks of Beverston in Gloucestershire.
On 27 Jul 1768 William Dalrymple Crichton 5th Earl Dumfries 4th Earl of Stair (age 69) died. Patrick Mcdouall Crichton 6th Earl Dumfries (age 41) succeeded 6th Earl Dumfries. His half first cousin John Dalrymple 5th Earl of Stair (age 48) succeeded 4th Earl of Stair.
In 1790 Banks Jenkinson 6th Baronet (age 69) died. His half first cousin Charles Jenkinson 1st Earl Liverpool (age 60) succeeded 7th Baronet Jenkinson of Walcot in Oxfordshire and of Hawkesbury in Gloucestershire.
On 10 Mar 1791 William Wentworth 2nd Earl Strafford (age 68) died. His half first cousin Frederick Wentworth 3rd Earl Strafford (age 59) succeeded 3rd Earl Strafford 2C 1711.
On 06 Sep 1824 John Roper 13th Baronet Teynham (age 57) died unmarried. His half first cousin Henry Francis Roper-Curzon 14th Baronet (age 57) succeeded 14th Baron Teynham of Teynham in Kent.
On 09 Dec 1826 John Evelyn Pierrepont Dormer 10th Baron Dormer (age 55) died. His half first cousin Joseph Thaddeus Dormer 11th Baron Dormer (age 36) succeeded 11th Baron Dormer of Wyng in Buckinghamshire, 11th Baronet Dormer of Wyng in Buckinghamshire.
On 17 Jul 1827 George Douglas 16th Earl Morton (age 66) died. His half first cousin George Sholto Douglas 17th Earl Morton (age 37) succeeded 17th Earl Morton.
On 14 Oct 1827 Frederick North 5th Earl Guildford (age 61) died. His half first cousin Francis North 6th Earl Guildford (age 54) succeeded 6th Earl Guildford 3C 1752, 8th Baron Guildford.
On 31 Mar 1847 William Eardley-Twisleton-Fiennes 9th or 15th Baron Saye and Sele (age 48) died. His half first cousin Frederick Twisleton-Wykeham-Fiennes 10th or 16th Baron Saye and Sele (age 47) succeeded 10th or 16th Baron Saye and Sele 1C 1447.
On 08 Jul 1849 Henry Leslie Pepys 3rd Baronet (age 65) died. His half first cousin Charles Christopher Pepys 1st Earl of Cottenham (age 68) succeeded 4th Baronet Pepys of Brook Street.
On 03 Oct 1851 Charles Jenkinson 3rd Earl Liverpool (age 67) died. Earl Liverpool 1C 1796 and Baron Hawkesbury of Hawkesbury in Gloucestershire extinct. His half first cousin Charles Jenkinson 10th Baronet (age 72) succeeded 10th Baronet Jenkinson of Walcot in Oxfordshire and of Hawkesbury in Gloucestershire. Katherine Campbell Lady Jenkinson (age 71) by marriage Lady Jenkinson of Walcot in Oxfordshire and of Hawkesbury in Gloucestershire.
On 29 Aug 1852 George Boscawen 2nd Earl Falmouth (age 41) died without issue. Earl Falmouth 2C 1821 extinct. His half first cousin Evelyn Boscawen 6th Viscount Falmouth (age 33) succeeded 6th Viscount Falmouth 2C 1720.
On 22 Oct 1855 William Molesworth 8th Baronet (age 45) died without issue. His half first cousin Reverend Hugh Henry Molesworth 9th Baronet (age 37) succeeded 9th Baronet Molesworth of Pencarrow in Cornwall. His will provided for his widow Andalusia Carstairs (age 45) to live at Pencarrow during her lifetime.
On 19 Jul 1860 John Elphinstone 13th Lord Elphinstone (age 53) died at King Street. His half first cousin John Elphinstone-Fleming 14th Lord Elphinstone (age 40) succeeded 14th Lord Elphinstone.
In 1884 Charles Goring 9th Baronet (age 55) died. His half first cousin Craven Charles Goring 10th Baronet (age 42) succeeded 10th Baronet Bowyer aka Goring of Highden in Sussex.
In 1887 George Lewis Wilmot 5th Baronet (age 62) died. His half first cousin Robert Rodney Wilmot 6th Baronet (age 33) succeeded 6th Baronet Wilmot of Osmaston in Derbyshire.
On 05 Dec 1889 Percy Florence Shelley 3rd Baronet (age 70) died. His half first cousin Edward Shelley 4th Baronet (age 61) succeeded 4th Baronet Shelley of Castle Goring in Sussex.
On 28 Jan 1890 Chandos Stanhope Reade 8th Baronet (age 38) died at Meldreth. His half first cousin George Compton Reade 9th Baronet (age 44) succeeded 9th Baronet Reade of Barton in Berkshire. Melissa Ray Lady Reade by marriage Lady Reade of Barton in Berkshire.
On 07 Jul 1894 Henry Ainslie Hoare 5th Baronet (age 70) died. His half first cousin Henry Hugh Hoare 6th Baronet (age 28) succeeded 6th Baronet Hoare of Barn Elms in Surrey.
On 19 Dec 1895 Rainald Knightley 1st Baron Knightley (age 76) died without issue. Baron Knightley extinct. His half first cousin Valentine Knightley 4th Baronet (age 83) succeeded 4th Baronet Knightley of Fawsley.
On 14 Mar 1897 Craven Charles Goring 10th Baronet (age 55) died. His half first cousin Harry Yelverton Goring 11th Baronet (age 57) succeeded 11th Baronet Bowyer aka Goring of Highden in Sussex.
In 1913 Charles Allanson-Winn 4th Baron Headley (age 67) died. His half first cousin Rowland Allanson-Winn 5th Baron Headley (age 57) succeeded 5th Baron Allanson and Winn of Aghadoe in County Kerry, 5th Baronet Winn of Little Warley in Essex, 11th Baronet Winn of Nostel in Yorkshire.
In 1914 Benjamin Rupert Chapman 6th Baronet (age 49) died. His half first cousin Thomas Chapman 7th Baronet (age 67) succeeded 6th Baronet Chapman of Killua Castle.
On 30 Jul 1917 Wyndham Knatchbull 12th Baronet (age 72) died. His half first cousin Cecil Knatchbull-Hugessen 4th Baron Brabourne (age 53) succeeded 13th Baronet Knatchbull of Mersham Hatch in Kent.
On 20 Oct 1925 Andrew Fleming Hudleston le Fleming 8th Baronet (age 70) died at Dunedin, New Zealand without issue. His half first cousin William Hudleston le Fleming 9th Baronet (age 64) succeeded 9th Baronet Fleming of Rydal in Cumbria.
On 12 Apr 1929 Francis Baring 2nd Earl Northbrook (age 78) died. Earl Northbrook extinct. His half first cousin Francis Arthur Baring 4th Baron Northbrook (age 47) succeeded 4th Baron Northbrook, 6th Baronet Baring of Larkbeer in Devon.
On 29 Oct 1929 Genille Cave-Browne-Cave 12th Baronet (age 60) died. His half first cousin Reginald Ambrose Cave-Browne-Cave 13th Baronet (age 69) succeeded 13th Baronet Cave of Stanford in Northamptonshire.
On 23 Feb 1934 Osbert Mordaunt 11th Baronet (age 50) died. His half first cousin Henry John Mordaunt 12th Baronet (age 66) succeeded 12th Baronet Mordaunt of Massingham Parva.
In 1939 Cosmo Gordon Antrobus 5th Baronet (age 80) died. His half first cousin Philip Humphrey Antrobus 6th Baronet (age 63) succeeded 6th Baronet Antrobus of Antrobus in Cheshire.
On 06 Apr 1940 Evelyn Robert Pierrepont 5th Earl Manvers (age 51) died. His half first cousin Gervas Pierrepont 6th Earl Manvers (age 58) succeeded 6th Earl Manvers, 6th Viscount Newark 2C 1796, 6th Baron Pierrepont of Holme Pierrepont 3C 1796.
On 04 Oct 1940 Charles John Hubert Miller 8th Baronet (age 82) died. His half first cousin Henry Holmes Miller 9th Baronet (age 73) succeeded 9th Baronet Miller of Chichester in Sussex.
On 24 Apr 1944 George Master Byng 9th Viscount Torrington (age 57) died. His half first cousin Arthur Stanley Byng 10th Viscount Torrington (age 67) succeeded 10th Viscount Torrington.
On 19 Feb 1958 Robert John Aldborough Henniker 7th Baronet (age 69) died. His half first cousin Mark Chandos Auberon Henniker 8th Baronet (age 51) succeeded 8th Baronet Henniker of Newton Hall in Essex.
On 05 Aug 1961 Caryl Ernest Bagot 6th Baron Bagot (age 84) died. His half first cousin Henry Eric Bagot 7th Baron Bagot (age 67) succeeded 7th Baron Bagot of Bagot's Bromley in Staffordshire, 12th Baronet Bagot of Blithfield Hall.
On 22 Feb 1963 William Grosvenor 3rd Duke Westminster (age 68) died. He was buried at St Mary's Church, Eccleston [Map]. His half first cousin Gerald Hugh Grosvenor 4th Duke Westminster (age 56) succeeded 4th Duke Westminster, 6th Marquess Westminster, 7th Earl Grosvenor, 13th Baronet Grosvenor of Eaton in Cheshire.
On 11 Sep 1963 Montagu Henry Edmund Cecil Towneley Bertie 8th Earl Abingdon 13th Earl Lindsey (age 75) died. His half first cousin Richard Bertie 14th Earl Lindsey 9th Earl Abingdon (age 32) succeeded 14th Earl Lindsey, 9th Earl Abingdon.
On 25 Sep 1971 Michael George Motley Stracey 8th Baronet (age 60) died. His half first cousin John Simon Stracey 9th Baronet (age 32) succeeded 9th Baronet Stracey of Rackheath in Norfolk.
In 1975 Montrose Stuart Graham 12th Baronet (age 70) died. His half first cousin Ralph Wolfe Graham 13th Baronet (age 66) succeeded 13th Baronet Graham of Esk in Cumberland.
On 13 Apr 1976 John St John 20th Baron St John Bletso (age 58) died unmarried. His half first cousin Andrew St John 21st Baron St John of Bletso (age 57) succeeded 21st Baron St John Bletso 1C 1559, 18th Baronet St John of Woodford in Northamptonshire 1660.
In 1979 Francis Elliot Temple Blackwood 6th Baronet (age 77) died. His half first cousin Francis George Blackwood 10th Baron Dufferin and Clandeboye (age 62) succeeded 7th Baronet Blackwood of the Navy.
On 13 Dec 1989 Robert Throckmorton 11th Baronet (age 81) died. His half first cousin Anthony John Benedict Throckmorton 12th Baronet (age 73) succeeded 12th Baronet Throckmorton of Coughton in Warwickshire.
On 07 Aug 1996 John Edmund Cradock-Hartopp 9th Baronet (age 84) died. His half first cousin Kenneth Alston Cradock-Hartopp 10th Baronet (age 78) succeeded 10th Baronet Cradock-Hartopp.
On 14 Nov 1996 Thomas Fowell Victor Buxton 6th Baronet (age 71) died. His half first cousin Jocelyn Charles Roden Buxton 7th Baronet (age 72) succeeded 7th Baronet Buxton of Belfield in Dorset.
On 12 Jan 1999 Richard Newton Rycroft 7th Baronet (age 80) died. His half first cousin Richard John Rycroft 8th Baronet (age 52) succeeded 8th Baronet Rycroft of Calton in Yorkshire.
In Feb 2003 Anthony Rowland Clegg-Hill 8th Viscount Hill (age 71) died without issue. His half first cousin Peter David Clegg-Hill 9th Viscount Hill (age 57) succeeded 9th Viscount Hill of Hawkestone and Hardwicke in Shropshire, 9th Baron Hill of Almaraz and of Hawkestone in Shropshire 2C 1816, 11th Baronet Hill of Hawkestone in Shropshire.
