Use your head!

and Use your noggin! and Use your noodle!

exclam. Think!; Think it through! You know the answer. Use your head! Use your noggin’, dogg!

Name	Pronounced	Usage
Berengaria	-	Ancient Germanic (Latinized)
Waltraud	-	German
Sinclair	['siŋklɛə]
Maybelle	-	English
Diethelm	DEET-helm	German
Oona	OO-na (Irish), O:-nah (Finnish)	Irish, Finnish