Trudy, There is a Roach surname project at Family Tree DNA, so you should sign up for a yDNA, 37 marker test, if you can find the right person to test. Does your brother have a son? Is your father still living? If not, is a brother of your father still living, or a son of your father's brother? It helps to think that you're looking for a close male relative with the surname Roach. If you have no male Roach family members to test, your next best bet is for you to take a Family Finder test at Family Tree DNA. That may help you find cousins back several generations Good luck!