lĭmĕnarcha
ae, m.
vox hybrida; limen, ἄρχω; cf. Germ. Markgraf; Engl. margrave
I.
a commander on the frontier: limenarchae et stationarii fugitivos deprehensos recte in custodiam retinent, Dig. 11, 4, 4; Paul. Sent. 1, 6, 3 (acc. to others, a harbor-master, port-warden).