στρατοπεδάρχης G4759
stratopedárchēs · strat-op-ed-ar'-khace
from στρατόπεδον and ἄρχω; a ruler of an army, i.e. (specially), a Prætorian præfect:--captain of the guard.
1 Occurrence in the King James Bible
Acts 28:16And when we came to Rome, the centurion delivered the prisoners to the captain of the guard: but Paul was suffered to dwell by himself with a soldier that kept him.