Zheng Ruotong's English name is that a friend of mine asked me if she didn't know her English name. I don't even know! So let's work it out.

Zheng Ruotong (in English grammar, commas are used to distinguish surnames from first names)

Generally speaking, self-introduction is to say your first name "Ruotong" before your surname "Zheng":

If the first name is written before the last name, there is no comma.

If you want to choose another homophonic English name, you can consider: Toni, Tonya, Rona, Ronnie.