John Charles Moore Grant, 9th Baron de Longueuil
John Charles Moore de Bienville Grant, 9th Baron de Longueuil was born in 1861 at Bath, Somerset.
He was the son of Charles James Irwin Grant and Anne Marie Catherine Trapman.
He succeeded to the title of Baron de Longueuil on 3 August 1931.
He died on 17 October 1935 at Pau, France.
Charles William Grant, 5th Baron de Longueuil
Charles William Grant was born in 1782.
He was the son of Captain David Alexander Grant and Marie-Charles-Joseph Le Moyne, Baronne de Longueuil.
He married Caroline Coffin, daughter of General John Coffin and Anne Mathews, in 1813.
He became a member of the Legislative Council of Lower Canada.
He succeeded to the title of Baron de Longueuil on 17 January 1841.
He died on 5 July 1848 at his residence of Alwington House in Kingston.
Charlie Partridge
Charles James Partridge( born December 7, 1973) is an American college football coach.
Henry Krause
Henry J." Red" Krause, Jr.( August 28, 1913 – February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.
He played college football at St. Louis University.
He is the grandfather of Jennifer Krause
He is the great grandfather of Payton Hoeing
Jonnie Irwin
Jonathan James Irwin( born 18 November 1973) is an English television presenter, writer, lecturer, business and property expert.
Charles James (footballer)
Charles James( 1882–1960) was an English footballer who played for Stoke.
Charles Colmore Grant, 7th Baron de Longueuil
Charles Colmore Grant, 7th Baron de Longueuil was the son of Charles James Irwin Grant, 6th Baron de Longueuil and Harriet Cregoe- Colmore.
He was born on 13 April 1844 at Cheltenham, Gloucestershire, England.
In 1878, he married Mary Wayne, daughter of Thomas Wayne.
In 1880, he claimed a royal recognition of his right to the barony of Longueuil.
By the treaty of Quebec the sovereignty of Canada passed from the Kings of France to the Kings of Great Britain but with the reservation that all rights and privileges" of what kind soever" should be reserved and secured to all individuals of French descent to which they had been entitled under the previous regime.
Queen Victoria was graciously pleased to recognise the claim of Charles Colmore Grant to the title of Baron de Longueuil.
He died on 13 December 1898 at age 54 at New York City.
He was without issue and his half- brother Reginald Charles succeeded him.
Charles James Irwin Grant, 6th Baron de Longueuil
Charles James Irwin Grant, only son of Charles William Grant, 5th Baron de Longueuil and Caroline Coffin, was born in Montreal on 1 April 1815.
He served in the 79th Regiment as a lieutenant for a while.
He later married
Henriet Colmore, from whom he fathered two sons (Alexander Frederick, died age 2 and Charles Colmore) as well as a daughter.
His wife Henriet died in 1847 and he remarried in Charleston, South Carolina on 18 January 1849 to Anne Trapman, second daughter of Louis Trapman, a consul.
He had many children from this union including Reginald Charles and John Charles Moore.
He died on 26 February 1879 at age 63.
James Billmyer
James Irwin Billmyer( born 1897) was an American modern painter and illustrator.
Anthony Robinson (Unitarian)
Anthony Robinson( 1762–1827) was an English Unitarian minister and friend of Charles James Fox.

Question: Who is Charles James Irwin Grant, 6Th Baron De Longueuil's paternal grandfather?
Answer: Captain David Alexander Grant