key figure

n. an important person in an event; a person central to an event. Sam is not exactly a key figure, but he can lead us to Mr. Big.

Name	Pronounced	Usage
Bogna	BAWG-nah	Polish
Leah	LEE-ə (English)	English, Hebrew, Biblical, Biblical Hebrew
Dilys	-	Welsh
Virginia	[və(:)'dʒinjə]
Lamprecht	LAHMP-rekht (German)	German (Archaic), Ancient Germanic
Viatrix	-	Late Roman