How to write the English name of Long Heng Yue?

The English name translation of "Long Heng Yue" is the same as Pinyin;

Long, Heng Yue (in English grammar, surnames are distinguished by commas before their first names)

Generally speaking, self-introduction is to say the name "Heng Yue" before the surname "Long":

Heng Yue Lang (no comma is needed when the first name is written before the last name)

If you want to find another homophonic English name, you can consider: York, Hank, Hans, Henson, Hansen.