Henry St John, 18th Baron St John of Bletso
Henry Beauchamp Oliver St John, 18th Baron St John of Bletso DL (24 June 1876 – 17 October 1920) was an English peer.
He was the eldest son of Beauchamp St John, 17th Baron St John of Bletso, and his wife Helen Thornton.
He was educated at Wellington College and Magdalene College, Cambridge.
On 26 July 1901, he was made a Deputy Lieutenant of Bedfordshire.
Henry became the 17th Lord St John on the death of his father in 1912, and inherited Melchbourne Park.
He was a JP for Bedfordshire and described as Church of England Conservative.
He owned about and gave his interests as county pursuits and county business.
He died unmarried at the age of 44 and was succeeded by his younger brother, Moubray.
Henry St John, 13th Baron St John of Bletso
Henry Beauchamp St John, 13th
Baron St John of Bletso
( 2 August 1758- 18 December 1805) was a British peer.
St John was born at Woodford, Northamptonshire, the eldest son of John St John, 12th Baron St John of Bletso, and his wife Susanna Simond, daughter of Peter Simond, merchant of London.
He succeeded his father as 13th Baron in 1767.
He was at a private school at Easton, near Stamford, and was admitted at St John's College, Cambridge, on 15 October 1776.
He was awarded MA in 1778.
St John died at the age of 47 after a long illness.
St John married Emma Maria Elizabeth Whitbread, daughter of Samuel Whitbread of Cardington, Bedfordshire, on 2 December 1780.
She brought £ 30,000 to the marriage.
His son St John died aged seven in March 1791 at Exeter and he was succeeded in the barony by his brother Andrew.
Moubray St John, 19th Baron St John of Bletso
Moubray St Andrew Thornton St John, 19th
Baron St John of Bletso DL JP( 5 November 1877 – 28 October 1934) was an English peer.
St Andrew St John, 15th Baron St John of Bletso
St Andrew St John, 15th Baron St John of Bletso( 8 November 1811 — 27 January 1874) was an English peer.
Beauchamp St John, 17th Baron St John of Bletso
Beauchamp Moubray St John, 17th Baron St John of Bletso (4 December 1844 – 10 May 1912) was an English peer.
St John was born at Melchbourne, the second son of St Andrew St John, 15th Baron St John of Bletso and his wife Eleanor Hussey.
He served in the Highland Light Infantry until 1867.
He inherited the title Baron St John of Bletso on the death of his brother in 1887 without male heir to become the 17th Baron, and moved to Melchbourne Park, Bedfordshire.
He served as Lord Lieutenant of Bedfordshire from 1905 to 1912.
St John married Helen Charlotte Thornton in 1869 and had a very large family.
His eldest son Henry succeeded to the title, followed by his second son Mowbray.
His daughter Edith married George Lawson Johnston, 1st Baron Luke.
Helen died in 1909 and Beauchamp married, secondly, in 1911, to Ethel Susan Lutley (died 1945), daughter of John H. Lutley of Brockhampton Park, Hereford.
John St John, 20th Baron St John of Bletso
John Moubray
Russell St John, 20th
Baron St John of Bletso TD( 3 August 1917 – 13 April 1976) was an English peer.
The only son of Moubray St John, 19th Baron St John of Bletso and his wife Evelyn, John St John became the 20th Baron Lord St John of Bletso on the death of his father in 1934.
He was living at a hotel in Dublin and died unmarried in 1976, aged 58, and the title passed to a distant cousin.
Oliver St John, 1st Baron St John of Bletso
Oliver St John of Bletsoe, 1st Baron St John of Bletso( c. 1522 – 21 April 1582) was an English peer.
He was the son of Sir John St John( born 1498) of Bletsoe and Spelsbury and his first wife Margaret, the daughter of Sir William Waldegrave.
His paternal great- great- great- grandfather Sir Oliver St John of Bletsoe, Spelsbury and Lydiard Tregoze( d. 1437) was the husband of Margaret Beauchamp of Bletso, great- great- granddaughter of Roger de Beauchamp, who was summoned to Parliament as Baron Beauchamp of Bletso from 1363 to 1379.
Since then that title had not been assumed, although St John was considered to be the line of heir.
On 13 January 1559 he was raised to the peerage himself as Baron St John of Bletso, in the county of Bedfordshire.
John St John, 11th Baron St John of Bletso
John St John, 11th Baron St John of Bletso( died 24 June 1757) was an English peer.
The son of Andrew St John and his wife Jane Blois, daughter of William Blois of Cockfield Hall, Suffolk, he was a nephew of Paulet St John, 8th Baron St John of Bletso and succeeded his brother Rowland St John, 10th Baron St John of Bletso to the family title in 1722.
Lord St John married Elizabeth Crowley( the daughter of Ambrose Crowley) at Greenwich on 6 March 1725.
Their children included: British comedian and actor Alexander Armstrong is a direct descendant of Lord St John.
Oliver St John, 3rd Baron St John of Bletso
Oliver St John, 3rd Baron St John of Bletso( c. 1540–1618) was an English politician who sat in the House of Commons from 1588 until 1596 when he inherited the peerage as Baron St John of Bletso.
St John was a son of Oliver St John, 1st Baron St John of Bletso, and Agnes Fisher.
He was High Sheriff of Bedfordshire in 1585.
In 1588 he was elected Member of Parliament for Bedfordshire.
He was High Sheriff of Bedfordshire again in 1589 and was re-elected MP for Bedfordshire in 1593.
He succeeded to the barony on the death of his brother John without male issue on 23 October 1596.
He was Lord Lieutenant of Huntingdonshire from April 1597 until his death.
St John married Dorothy Reid, daughter of Sir John Rede or Reid, of Odington, Gloucestershire.
They had eight sons and seven daughters:
His eldest son Oliver inherited the Barony and became Earl of Bolingbroke.
Of his remaining sons, John and Dudley died young, while the remaining five all became Members of Parliament.
John St John, 12th Baron St John of Bletso
John St John of Northwood, 12th Baron St John of Bletso( 15 November 1725 – 20 April 1767) was a British peer.
St John was the eldest son of John St John, 11th Baron St John of Bletso and his wife Elizabeth Crowley, daughter of Sir Ambrose Crowley of Greenwich.
He was educated at Winchester College and at New College, Oxford.
He inherited the title of Baron St John of Bletso on the death of his father in 1757.
St John died at the age of 41 at Nice but was buried at Bletsoe.
St John married Susanne Louise Simond, the daughter of Peter Simond, a wealthy French Huguenot merchant in London.
She brought £ 20,000 to the marriage.
Their eldest son, John Peter died aged just three and St John was succeeded in the barony successively by his second son Henry and his third son St Andrew.
His widow died at Bath, Somerset in 1805 at the age of 80.

Question: Who is Henry St John, 13Th Baron St John Of Bletso's paternal grandfather?
Answer: John St John, 11th Baron St John of Bletso