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
Vincente	veen-CHEN-te	Italian
Jaylon	JAY-lən	African American (Modern)
Rozanne	ro-ZAN	English
Helladius	-	Late Greek (Latinized)
Ada	AY-də (English), AH-dah (Polish, Finnish)	English, German, Polish, Hungarian, Italian, Finnish
Svea	SVE-ah	Swedish