(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
Fortunata	-	Italian, Spanish, Portuguese, Late Roman
Blanka	BLAHN-kah (Czech, Slovak, Polish, Croatian), BLAWN-kaw (Hungarian)	Czech, Slovak, Polish, Hungarian, Croatian
Arti	-	Indian, Hindi, Marathi
Vicky	VIK-ee	English
Whitley	['hwitli]
Chikere	-	Western African, Igbo