(I'll be) hanged if I know!

I have absolutely no idea! A: "How are you supposed to turn on this newfangled computer?" B: "Hanged if I know!" I'll be hanged if I know how to fill out these tax forms!

Common Names:

Name	Pronounced	Usage
Galena	-	Bulgarian, Macedonian
LÉAn	-	Irish
Mahavir	-	Indian, Hindi
Erasyl	-	Kazakh
Kilikina	-	Hawaiian
Henning	HE-ning (German), HEN-ning (Swedish)	German, Danish, Norwegian, Swedish