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.
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.
Ronald Charles Grant, 10th Baron de Longueuil
Ronald Charles Grant, 10th Baron de Longueuil was born on 13 March 1888 at Pau, France.
He was the son of John Moore Charles de Bienville Grant.
He married Ernestine Hester Maud Bowes- Lyon, daughter of the Hon. Ernest Bowes- Lyon and Isobel Hester Drummond, on 4 October 1918.
He was educated at Elizabeth College, Guernsey.
He was in the French Foreign Legion and was a civil engineer.
He succeeded to the title of Baron de Longueuil on 17 October 1935.
He fought in the Second World War as an officer in the service of the 3rd Battalion, King's Own Yorkshire Light Infantry.
Charles R. Moore (actor)
Charles R. Moore( April 23, 1893 in Chicago, Illinois – July 20, 1947 in Los Angeles, California) was an African- American actor who appeared in over 100 films in his acting career, and was sometimes credited as Charles Moore or Charlie Moore
Rebecca Grant (British actress)
Rebecca Helena Grant de Longueuil (born 1982), commonly known as Rebecca Grant, is a British actress, most notable for her role as Daisha Anderson on the BBC medical drama "Holby City".
She also has a singing career and is known by the stage name, Rebecca Swing.
Through her father, Michael Grant, 12th Baron de Longueuil, Grant is a second cousin twice removed of Elizabeth II of the United Kingdom.
Charles le Moyne de Longueuil, Baron de Longueuil
Charles( II) le Moyne de Longueuil, Baron de Longueuil( December 10, 1656 – June 7, 1729) was the first native- born Canadian to be made Baron in New France.
Charles le Moyne de Longueuil was the eldest son of Charles le Moyne de Longueuil et de Châteauguay and spent his childhood in France as a page to one of Governor Frontenac's relatives.
He was a military officer and governor of Trois- Rivières.
He was appointed governor of Montreal in 1724.
When the Governor General of New France, Vaudreuil died in 1725, Longueuil was made responsible for the general administration of New France, until a new governor could be appointed.
He was disappointed that the position was not given to him, being a natural progression from the governing of Trois- Rivieres.
and later of Montreal, and, for a time, acting administrator of New France;
Charles Moore (dancer)
Charles Moore( May 22, 1928 – January 23, 1986) was an African- American dancer, choreographer, teacher and founder of The Charles Moore Dance Theatre in Brooklyn, New York.
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 III Le Moyne
Charles III Le Moyne( Longueuil,( 18 October 1687 – 17 January 1755) was the second baron de Longueuil.
He succeeded his father Charles le Moyne de Longueuil, Baron de Longueuil in 1729.
He became Governor of Montreal, and administrator by interim of New 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.

Question: When did John Charles Moore Grant, 9Th Baron De Longueuil's father die?