Hi Tony, You probably have learned that the Irish have several variations in spelling for the same name. Mournian phonetically sounds like Mournane which is found in the Griffith's Valuation in Counties Tipperary and Kerry (4). Originally when I read your name I thought of Marmion which is found in County Down and several other counties. Marnane also is pretty close phonetically to Mournian. Do you have any indication from what area of County Down Robert Mournian came from? You peaked my interest when you mentioned the few places where the name is found so I googled and found your post about Robert in California. I'm in northern California. Beannachtai, Margaret (Máiread)