4th cousin is far enough away geneticaly that there wont be any problems with having childern. Having the same name will save you So many hours! Drivers licence, SS card, utility bills, insurence, my head reels when I think of what I went through! As for hyphenating your name, only the upper crust of society cares about that, and if you are of the family of New England Chatworths, use your mothers maden name, as in Ricki "fill in the balnk"-Chatsworth. Don't let semantics get into the way of perfection.