Is there a law on having to have to use either the mothers or fathers lastname when naming a newborn?

For example: Mothers lastname is Jones and the Fathers lastname is Smith; but the Mother wanted to use the lastname Johnson for her newborn baby, but Johnson has no ties to either both hers or his name. Is there a law on having to have either the mothers or fathers lastname given to a newborn?

Is there a law on having to have to use either the mothers or fathers lastname when naming a newborn?
It probably depends on the state. But in mine, you can name it whatever you want - unless its crude - or something like "God"
Reply:not in the uk anyway. if ur in the states its probally different.
Reply:Why woulnd't someone want to share the last name with their child? I think it's a bad idea to pick a random last name
Reply:You can name it what ever you want if it's the first or last name but you can't pick it's last because usually it's supposed to have it's dad's last name.
Reply:you can put anything you want on the birth certificate.
Reply:no
Reply:Not at all. You can put whatever surname you want on the birth certificate.
Reply:nope. no law. at least not in minnesota. my friend gave her son her grandmother's maiden name for a last name
Reply:i would think so yes