To Kiltaglassen: When I found a marriage inLDS Pilot site of REBECCA to JAMES DUNLOP....it DID say she was Rebecca ROBERTSON, daughter of Henry ROBERTSON, and they married Nov 26, 1868 in Mullafad….but I was told that often ROBINSON and ROBERTSON have been interchanged.
I also found James Dunlop, single, son of John Dunlop, married Rebecca Robinson, single, daughter of Henry Robinson on Nov 26, 1868 in Mullafad, Co. Fermanagh. Source: Ireland Select Marriages 1619-1898, page 159 #50.
Thanks anyways. So there was no real problem with the name change. Joker.