(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
Helena	['helinə]
Kalani	-	Hawaiian
Feroz	-	Urdu
Maurice	MAWR-is (English), mə-REES (English), mo-REES (French)	English, French
Zach	ZAK	English
Jotham	JO-thəm (English)	Biblical