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Kind of going off of what Anneza said below, I've had characters where I wrote the entire story with their name as just a _____ until the very end because I couldn't figure it out. It worked out fine. If you have more than one character that you don't know the name of, you can just do '-----' and '_____.' Feel free to use a name generator to generate random names and see if there are any you like. Or flip through a name book. A lot of names I've chosen have been random names that I just saw randomly (in real life and in the name book) and liked, or names that started off as nicknames for the character. To conclude, it's more important to just get your story written down first. The details don't matter yet.
However, some names:
David
Emil
Ezra
Peter
Miles
Jude
Finneas
Hayden
Asher
Reed
Sawyer
I could probably give some better suggestions if I knew more about your story theme/characters.