William "Frenchie" Marchant (9 August 1947 – 28 April 1987) was a Northern Irish loyalist and a high-ranking volunteer in the Ulster Volunteer Force (UVF). He was on a Garda list of suspects in the 1974 Dublin car bombings, and was allegedly the leader of the Belfast UVF unit known as "Freddie and the Dreamers" which hijacked and stole the three cars which were used in the bombings.