Correction - the Marie that you mentioned probably is the same Anna Marie (who started going by her middle name). She named her youngest daughter Marie as well. SHE is the one who is my aunt.
I understand that Patrick Heslin married Mary Ann Mantel, who was from County Longford. I also read that Patrick Heslin was the head carpenter at Tully Nally castle near Castlepollard, and was given some shares of land on Lake Derranavah nearby, where he was buried.