Originally belonged to a person who lived near or in a forest. It was probably originally derived, via Old French forest, from Latin forestam (silva) meaning “outer (wood)”.
Name given to someone who lived by a ford, possibly the official who maintained it. A famous bearer was the American industrialist Henry Ford (1863-1947).
Of Italian origin, possibly from a place derived from fondo meaning “deep”. The family of Henry Fonda (1905-1982) came from the Netherlands, but they were of Genoese origin.