Old French castelain, French châtelain, Latin castellanus pertaining to a castle, an occupant of a castle, Latin, a governor of a castle, from Latin castellum castle, citadel, diminutive of castrum fortified place. See castle and compare chatelaine.
castellan (plural castellans)
castellan m (plural castellans)
In a feudal, mediaeval context, this term refers to a local representative of the ruler, who ruled from a fortified castle on his ruler's behalf.