Thomas Timothée Vasse (27 February 1774 in Dieppe, Seine-Maritime – presumed 8 June 1801) was a French sailor who was lost in the surf on the south west coast of Australia in 1801, and presumed drowned. From Vasse's name is taken the name the Vasse, an early name for Busselton, for the land adjacent to where the incident occurred, the town of Vasse, and also a number of geographical features in the area including Vasse River and . In 1838, George Fletcher Moore questioned some of the local Wardandi people and was told that Vasse had not drowned. Moore wrote in his diary: