Background
He was the son of John Moore Charles de Bienville Grant.
He was the son of John Moore Charles de Bienville Grant.
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.
He 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.