chatelain

Etymology

From Middle English chateleyn, from Middle French chatelaine, from Old French chastelein and castelain (“castellan”), from chastel and castel (“castle”) + -ain (“-an: forming adj.”), from Medieval Latin castellum, from Latin castrum (“fort”) + -ellum (“-elle: forming diminutives”). Doublet of Castilian, castellano, castellanus, and castellan.