I'm not from Ulster but about 1 hour drive away. There are many thousands of Mooneys across Northern Ireland. Mooney is a traditional Irish name meaning wealthy or prosporous and originated from County Laois, a little further south.
Maybe you should check the spelling of Gilpin as its not a traditional Irish name. However, it may have been taken from Gilpatrick(meaning servant/follower of Saint Patrick) which is a very rare name today. I would think that if you got your hands on a telephone directory for the Fermamagh area in N.Ireland there would be but a handful of Gilpatricks listed(I mean like 3 or 4). I would recommend just calling these numbers and asking about your family history. You would be suprised what a close net community exists up there and also how fascinated people there will be they hear a strange American voice on the phone. Even if they are of no realation to you, they will propably be glad to help you and even take a personal interest in the matter.
Happy hunting.
