Save Type Surname (from location) Usage French, English Pronounced Pron. /kas.tɛl/(French) [key·simplify] Other Forms FormsCastle (English) Meaning & History Topographic name from a derivative of Late Latin castellum "castle" (a diminutive of Latin castrum "fort Roman walled city") or a habitational name from any of several places called Le Castel. French cognate and English variant of Castle.