This is a list of surnames in which the categories include castles.
BishopEnglish Means simply "bishop", ultimately from Greek ἐπίσκοπος (episkopos) meaning "overseer". It probably originally referred to a person who served a bishop.
WhiteEnglish Originally a nickname for a person who had white hair or a pale complexion, from Old English hwit"white".
WindsorEnglish From the name of a few English towns, one notably the site of Windsor Castle. Their names mean "riverbank with a windlass" in Old English, a windlass being a lifting apparatus. In 1917 the British royal family adopted this name (after Windsor Castle), replacing their previous name Saxe-Coburg and Gotha.