(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
Chikumbutso	-	Southern African, Chewa
Ayokunle	-	Western African, Yoruba
JÓNatan	-	Icelandic
Traian	-	Romanian
Mechthild	MEKHT-hilt	German
Ejiroghene	-	Western African, Urhobo