dean: [14] Etymologically, a dean is someone in charge of a group of ten people. That was the meaning of its ancestor, Greek dekānós, a word formed from déka ‘ten’. This eventually came to designate specifically someone in charge of ten monks, and this sense passed via late Latin decānus, Old French deien, and Anglo-Norman deen into English as the ‘head of a cathedral’. The modern French descendant of deien, doyen, was reborrowed into English in the 17th century. => doyen
