I want to ask, my family name is Cheng, my father is from the word "Dao", and I seem to be from the word "Chuan".

That's what the fortune teller arranged for you.

In the past, people's culture was not very high, and fortune-tellers used to distinguish the same generation.

I don't know how to name myself, so that would be good.

It is also convenient for families to add a word after the generation and give themselves a name.

Different families with the same surname have different generations. You'd better ask this question to your people, such as your grandfather. ....