Aww, girls snatch guys names all the time. I think it sounds cute. Is it prounced the same? If not, Marine doesn't sound like a name IMO. My brother in law was a Marine!
It's not because people use girls name on boys and boys name on girls that it makes it right. Marine is a name, it is the French form of Marina. If you click on it you will see it is pron mah-reen. ~~ Claire ~~