TLDR: “john-how pong” or simply “zen-how pain”.
Peng (彭) is my family name. It is hard to pronounce in English. The most similar analogies are Pong or Pung. English speaker might pronounce like Pain.
Zhenghao (正皓) is my given name with two Chinese characters. It sounds very similar to john-how. The instinct of an English speaker might pronounce zen-how.
I also have a Starbucks name “Mark Peng”.
I actually prefer you to call my Family name “Peng” as its posterior probability for referring me is higher than the names starting with Zhen(g) :)