Mr Louis Gustave Joseph Lesueur was born on 26 August 1876 in Brametot, a village in Normandy (Seine Maritime, France) the son of Cyr Casimir Lesueur (b.1839) and Héloise Sophie Mélanie Bouts (b.1847).

He was working for Thomas Cardeza by June 1910 when they were listed as passengers arriving, with Cardeza's wife Marie, at New York aboard the SS George Washington. He was described as standing 5ft, 5in, with a fair complexion, blond hair and grey eyes.

He boarded the Titanic at Cherbourg and travelled on the Cardeza's ticket (No. PC 17755); he occupied room B-101.

Mr Lesueur and the Cardezas were rescued in Lifeboat 3.

He served in the Army in World War One and was married to Alexandrine Vasseur on 1 July 1918 in Le Petit Quevilly, Normandy.   

He later worked as an interpreter and a personnel manager of some kind.

It is thought he committed suicide by hanging on or around 13 January 1939. His body found in petit Quevilly's woods a few days later. He was buried in Sotteville cemetery. At the time of his death he lived at 102, rue de Trianon in Sotteville-les-Rouen.