Avdelay (Russian: Авдела́й) is an old and rare Russian Christian male first name. It is derived from the Greek words audē/audio, meaning speech, prophecy/to listen, and laos, meaning people.
The diminutive of "Avdelay" is Avdya (А́вдя).
The patronymics derived from "Avdelay" are "Авдела́евич" (Avdelayevich; masculine) and "Авдела́евна" (Avdelayevna; feminine).
References
Avdelay Wikipedia(Text) CC BY-SA