a whizz-kid

a young person who is very clever and successful They've taken on some financial whizz-kid who's going to sort all their problems out.

Name	Pronounced	Usage
Wyn	WIN	Welsh
Jaylee	JAY-lee	English (Modern)
Harland	['ha:lənd]
Willy	WIL-ee (English), VI-lee (German), WIL-lee (Dutch), VIL-lee (Dutch)	English, German, Dutch
TÓFi	-	Ancient Scandinavian
Lawrence	['lɔrəns]