The name Fitzwilliam is of English origin and means "Son Of William." The origin is the culture in which the name originated, or in the case of a word--the language in which it most appears.
Fitzwilliam Darcy, character in the novel "Pride & Prejudice" by Jane Austen.
Fitzwilliam is on 81 BN name lists Fitzwilliam is currently not ranked on the BN charts Fitzwilliam is currently not ranked in U.S. births
Fitzwilliam 
