How to pronounce Donderewicz?

Two ways:

1) Don Der wiTS (Americanized)
Don pronounced like dawn
Der pronounced like 'dir' in dirt
Wits rhymes with pits

2) Dun Der aEY viCH (Polish)
Dun pronounced like 'dun' in the word dunce
Der pronounced like 'dir' in dirt
Aey pronounced like the 'a' in wave
Vich rhymes with pitch

Last Name

Polish