maven

and mavin (ˈmevnæ)

1. n. an expert; a self-proclaimed expert. (From Hebrew mevin via Yiddish.) A maven in the stock market you are not.

2. in. to act as a maven (sense 1). She’s always mavening about something.

Name	Pronounced	Usage
Maria	mah-REE-ah (Italian, German, Swedish, Norwegian, Danish, Dutch), mə-REE-ə (Catalan, English), MAHR-yah (Polish), MAH-ree-ah (Finnish)	Italian, Portuguese, Catalan, Occitan, German, Swedish, Norwegian, Danish, Faroese, Dutch, Frisian,
Josephina	jo-sə-FEEN-ə	English (Rare)
CÁNdido	KAHN-dhee-dho	Spanish
Claretta	-	Italian
Mikula	-	Czech (Rare)
Douglass	DUG-ləs	Scottish