Paternal Family Tree: Trelawny
Before 15th February 1687 [his father] Walter Trelawny of Poole in Cornwall [aged 29] and [his mother] Rebecca Hals [aged 26] were married. She a co-heiress of her brother Matthew Hals (d.1684) of Efford, from whom she inherited the manor of Efford. They had two sons and three daughters. Some sources describe the date of their marriage as 8th January 1690 which is inconsistent with the dates of birth of their two eldest children Harry Trelawny 5th Baronet and [his sister] Walter Trelawny of Poole in Cornwall.
On 15th February 1687 Harry Trelawny 5th Baronet was born to Walter Trelawny of Poole in Cornwall [aged 29] and Rebecca Hals [aged 26].
In 1699 [his mother] Rebecca Hals [aged 38] died.
On 26th March 1701 [his father] Walter Trelawny of Poole in Cornwall [aged 43] and Mary Trevill were married. There was no issue from the marriage.
On 8th January 1702 [his father] Walter Trelawny of Poole in Cornwall [aged 44] died.
On 19th January 1703 Harry Trelawny 5th Baronet [aged 15] matriculated Christ Church College, Oxford University.
On 23rd May 1706 Arnold Keppel 1st Earl Albermarle [aged 36] and Harry Trelawny 5th Baronet [aged 19] were present at Ramilles during the Battle of Ramilles.
Colonel James Gardiner [aged 18] was shot through the mouth and nearly killed by a French soldier who had returned to plunder the dead. However, Gardiner was spared after being mistaken for a French soldier.
In 1708 Harry Trelawny 5th Baronet [aged 20] was elected MP East Looe.
On 17th July 1716 Harry Trelawny 5th Baronet [aged 29] and Walter Trelawny of Poole in Cornwall were married. She the elder sister of John Trelawny 4th Baronet [aged 24]. They had been courting for many years before her father Bishop Jonathan Trelawny 3rd Baronet [aged 66] consented to their marriage. They had a son, who predeceased him, and three daughters, one of whom, Laetitia, also married a cousin. She the daughter of Bishop Jonathan Trelawny 3rd Baronet and Rebecca Hele Lady Trelawny. They were first cousins.
In 1728 [his daughter] Walter Trelawny of Poole in Cornwall was born to Harry Trelawny 5th Baronet [aged 40] and [his wife] Walter Trelawny of Poole in Cornwall. Coefficient of inbreeding 6.64%. She married 25th June 1754 her first cousin William Trelawny 6th Baronet and had issue.
Chronicle of Walter of Guisborough
A canon regular of the Augustinian Guisborough Priory, Yorkshire, formerly known as The Chronicle of Walter of Hemingburgh, describes the period from 1066 to 1346. Before 1274 the Chronicle is based on other works. Thereafter, the Chronicle is original, and a remarkable source for the events of the time. This book provides a translation of the Chronicle from that date. The Latin source for our translation is the 1849 work edited by Hans Claude Hamilton. Hamilton, in his preface, says: 'In the present work we behold perhaps one of the finest samples of our early chronicles, both as regards the value of the events recorded, and the correctness with which they are detailed; Nor will the pleasing style of composition be lightly passed over by those capable of seeing reflected from it the tokens of a vigorous and cultivated mind, and a favourable specimen of the learning and taste of the age in which it was framed.'
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On 25th June 1754 [his son-in-law] William Trelawny 6th Baronet [aged 32] and Walter Trelawny of Poole in Cornwall [aged 26] were married at Maker, Cornwall. They had a son and a daughter. They were first cousins.
On 2nd February 1756 [his brother-in-law] John Trelawny 4th Baronet [aged 64] died. His first cousin Harry [aged 68] succeeded 5th Baronet Trelawny of Trelawny in Cornwall.
On 7th April 1762 Harry Trelawny 5th Baronet [aged 75] died. His nephew [his son-in-law] William [aged 40] succeeded 6th Baronet Trelawny of Trelawny in Cornwall.
Kings Wessex: Great x 20 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 17 Grand Son of Owain "Great" King Gwynedd
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Kings Duke Aquitaine: Great x 24 Grand Son of Ranulf I Duke Aquitaine 820-866
Kings Spain: Great x 17 Grand Son of Alfonso II King Aragon
Great x 4 Grandfather: John Trelawny of Poole in Cornwall 
Great x 3 Grandfather: John Trelawny
Great x 4 Grandmother: Margery Lamellyn
Great x 2 Grandfather: Walter Trelawny of Poole in Cornwall
Great x 3 Grandmother: Anne Reskymer
Great x 1 Grandfather: Walter Trelawny of Poole in Cornwall 12 x Great Grandson of King John of England
Great x 4 Grandfather: John Killigrew 1502-1567 
Great x 3 Grandfather: John Killigrew 1502-1567
Great x 2 Grandmother: John Killigrew 1502-1567 11 x Great Granddaughter of King John of England
Great x 4 Grandfather: Anthony Cooke
Great x 3 Grandmother: Robert Cooke of Lavenham in Suffolk 10 x Great Granddaughter of King John of England
Great x 4 Grandmother: William Fitzwilliam 1275-1340 
9 x Great Granddaughter of King John of England
Grandfather: Jonathan Trelawny 2nd Baronet 13 x Great Grandson of King John of England
father: Walter Trelawny of Poole in Cornwall 11 x Great Grandson of King Edward III of England
Great x 4 Grandfather: Edward Seymour 1st Duke of Somerset 6 x Great Grandson of King Edward III of England
Great x 3 Grandfather: Edward Seymour 
7 x Great Grandson of King Edward III of England
Great x 4 Grandmother: Catherine Filliol
Great x 2 Grandfather: William Seymour 8 x Great Grandson of King Edward III of England
Great x 3 Grandmother: Margaret Walshe
Great x 1 Grandfather: William Seymour 9 x Great Grandson of King Edward III of England
Great x 3 Grandfather: Arthur Champernowne
Great x 2 Grandmother: Elizabeth Champernowne Baroness Seymour
Grandmother: William Seymour 10 x Great Granddaughter of King Edward III of England
Great x 3 Grandfather: John Killigrew 1502-1567
Great x 2 Grandfather: John Killigrew 1502-1567
Great x 1 Grandmother: John Killigrew 1502-1567 11 x Great Granddaughter of King John of England
Great x 4 Grandfather: Robert Cooke of Lavenham in Suffolk
Great x 3 Grandfather: Anthony Cooke
Great x 4 Grandmother: Alice Saunders
Great x 2 Grandmother: Robert Cooke of Lavenham in Suffolk 10 x Great Granddaughter of King John of England
Great x 4 Grandfather: William Fitzwilliam 1275-1340 8 x Great Grandson of King John of England
Great x 3 Grandmother: William Fitzwilliam 1275-1340 9 x Great Granddaughter of King John of England
Harry Trelawny 5th Baronet 12 x Great Grandson of King Edward III of England
Grandfather: Matthew Hals 1676 of Efford in Cornwall
mother: Rebecca Hals