phylarchus, i, m., = φύλαρχος,
the chief of a tribe , a prince , emir : phylarchus Arabum, Cic. Fam. 15, 1, 2: Saracenorum, Amm. 24, 2; Sex. Ruf. Brev. 14.
phȳlarchus ī, m , φύλαρχος, a tribal chief, emir: Arabum. ...
An Elementary Latin Dictionary