Take it from a half-kraut: Ooo-vuh Who-nuh-my-err.
Correct! As a quarter-kraut and therefore half as qualified as you - I always thought a good rule of thumb: when there's an 'ei' you pronounce the 'i' and when there's an 'ie' you pronounce the 'e'.
Therefore: Who-nuh-my-er - is correct. #prayforAspinall