A castellan was the governor or captain of a castellany and its castle. The word stems from the Latin Castellanus, derived from castellum "castle". Sometimes also known as a constable, governor of the castle district or captain, the Constable of the Tower of London is, in fact, a form of castellan. A castellan could be either male or female, as when, in 1194, Beatrice inherited her father's castellany of Bourbourg upon the death of her brother, Roger.