Ronald Charles Grant, 10th Baron de Longueuil (13 March 1888 – 12 July 1959) was a British soldier and peer.
He was born in Pau, France,[1] the son of John Moore Charles de Bienville Grant.
He married Ernestine Hester Maud Bowes-Lyon, daughter of the Hon.
[1] He succeeded to the title of Baron de Longueuil on 17 October 1935.
[1] He fought in the Second World War as an officer in the service of the 3rd Battalion, King's Own Yorkshire Light Infantry.