The U.S. is generally very loosey-goosey about baby names. That’s why people can create original names for their children or call them “Moon,” “Apple,” “Peace,” etc.
The standards aren’t the same in other countries. Some places have official lists and won’t accept any name that doesn’t comply. Year ago, I met a man named Miguel Frankenfeld; he, the son of a Holocaust survivor, had been born in a South American nation that required a Spanish name for every baby.