I know one Aubrey who is a girl, young girl; but all others are men.
There is many times a progression from surname, to male name, to female name. Although not always in that order of course.
Kelly, Madison, Shannon, and more I think were surnames first. The biblical names I guess were all first names first? But, eventually became surnames because a person was the son of. For instance Isaac Ben Solomon would be Isaac the son of Solomon before surnames were in use. Or, that is how I understand it to be. i am not very knowledgeable on the topic.