The last Scottish king of this name was Alexander III. He was the last king of the House of Dunkeld and reigned from 1249 to 1286, and was, surprise, surprise the son of Alexander II. So, Mr Salmond would become Alexander IV - sounds better than King Salmond I, with Queen Sturgeon alongside him.Not sure why you'd think a commoner would become a King Dave, i'm sure IF Scotland were to gain independence whoever was the Leader of said Independent country would certainly not become a King or Queen, perhaps president, but certainly not royalty.