Trierarch
Trierarch , noun
[Latin trierarchus, Greek {not transcribed}; {not transcribed} a trireme + {not transcribed} a leader, a chief.]
(a)
(Greek Antiquities) The commander of a trireme.
(b)
(Greek Antiquities) At Athens, one who (singly, or jointly with other citizens) had to fit out a trireme for the public service.