captain

prop., of soldiers, , (Thuc., Xen.); hence, metaph., : .† one who stands first one in the front rank a leader Ac 24:5

voorstander

one who stands in the front rank, hence: a leader, ringleader, chief.

ringleader

one standing first in the ranks, i.e. a captain (champion)

ringleader

πρωτοστάτης, -ου, ὁ (πρῶτος, ἵστημι) [in LXX: Job.15:24 AB * ;] prop., of soldiers, one who stands first, one in the front rank (Thuc., Xen.); hence, metaphorically, a leader: Act.24:5.† (AS)