At the moment, I don't know if we are related. The earliest Donigan ancestor is John Donigan, b.approx. 1822 in County Cork. The 1860 Census for Little Valley, CattaruagusCounty list him as part of a railroad gang. A Michael Donagan is listed with him. Also Hannah Donigan is a witness to his marriage to Catherine Mahoney Nov.1857 in Dunkirk. Beyond these names and the other information I posted, I have very little data. Is anyone in your family named Albert,John or Wiiliam. Female names are Mary Jane,Elizabeth and Catherine. I do hope we can connect.