Why not ask him to help you pick a name? He’s four, so he would need help, but giving him the agency to find a name he likes for you would be good. If I were doing this, I would get a list of names, some common one, and some silly ones. Any in-jokes in the family that could be used? Try using the books he likes. If he reads the Llama Llama books, put “Mama Llama” on the list. Fancy Nancy? Put “Mother” on the list, but it has to be said in a “fancy accent.” Star Wars fans get MA-MA model AT-ATs, and so on. He can either pick one he likes right away, or he can try them out to see what fits best.
