Zipf

A German last name that has a silent p, so it would be pronounced “zif”. It will be mispronounced no matter how long someone knows them and they will likely give up trying to correct people by adulthood. People with this surname are also know for chocolate and mysteries.

Receptionist “And how do you spell you last name?”
Mr/Ms. Zipf “Zipf, as in Z-I-P-F”
Receptionist “Okay Mr/Ms. Zipif”