Where does “Merlin” come from?

Merlin (Portuguese) comes from English Merlin, from Middle English merlioun, from Old French emerillon, from Old French esmerillon, from Old French esmeril, from Italian smeriglio, from Greek σμερίλιον, from Ancient Greek σμερί — emery-powder, used by lapidaries.

Merlin (Portuguese): Merlin wizard who helped Arthur

Definitions

Merlin wizard who helped Arthur

Ancestry of “Merlin”, step by step

Step	Language	Word	Meaning
1	English	Merlin	A wizard in the Arthurian legend
2	Middle English	merlioun	merlin the falcon
3	Old French	emerillon	—
4	Old French	esmerillon	—
5	Old French	esmeril	—
6	Italian	smeriglio	emery; merlin; Synonym of sparviero
7	Greek	σμερίλιον	—
8	Ancient Greek	σμερί	—
9	Ancient Greek	σμύρις	emery-powder, used by lapidaries

Every word from Ancient Greek σμύρις →Every word from Ancient Greek σμερί →Every word from Greek σμερίλιον →