Archon

·noun One of the chief magistrates in ancient Athens, especially, by preeminence, the first of the nine chief magistrates.

archon
archōn, ōntis, m., = ἄρχων (a ruler), the highest magistrate at Athens after the abrogation of royal...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
archon
archōn ontis, m , ἄρχων, the highest magistrate of Athens. ...

An Elementary Latin Dictionary