The story
- Ancient Greek · derived fromπεντηκονταρχία
- Latin · borrowed frompentēcontarchia
- English todaypentecontarchy
From Latin pentēcontarchia, from Ancient Greek πεντηκονταρχία (pentēkontarkhía). By surface analysis, pentecontarch + -y.
Etymology from Wiktionary, CC BY-SA 4.0.