hegumen
The head of a monastery of the Eastern Orthodox Church or Eastern Catholic Churches.
From 1517 to 1637 a total of 19 Kirillov hegumens were transferred to other influential positions, and nine of them were raised to episcopal seats.
Where it comes from
Ultimately from Ancient Greek ἡγούμενος (hēgoúmenos, “leader”).
Adapted from the Wiktionary entry hegumen (CC BY-SA 4.0).