There are numerous sites in existence with the intent to assist the descendants of Chinese migrants to Australia, many devoted to the Amoy migrants / Amoy Shepherds.
Wikipedia has this page https://en.wikipedia.org/wiki/History_of_Chinese_Australians
My own collateral cousins "first Australian" on the Chinese side was known as "Tom" because that's what the white residents called most Chinese men. We have no idea what his Chinese name was, but he adopted the name "Tom", also occasionally being known as "Thomas", even though it likely had no similarity at all to his original name. I also know of descendants of Chinese "O’Young", and "O’Pun" ancestors.
Often Chinese immigrants would make up Anglicised names (such as "Johnnie Soo") because their Chinese names made for mockery when spoken in English form (Example Wong Back Hung.)
What is interesting to anyone doing research in this area, is just how many of the Amoy shepherds (in particular) married Scottish lasses, many just off the boat, or one of the many Irish orphan girls. (My cousin's ancestor married a German girl — and she was just a girl, being some 14 or so years old.)
IF records exist from the earlier days, it is well worth purchasing copies of them, as some of the information on them may be in Chinese, and give more detail than the English version.