Thank you. Seems to be only the migrants to Australia between 1834, and 1846 who migrated as McCallion or Callan and changed to Collins after 1843, or shortly after arrival. It's been interesting trying to find their connections prior to leaving Ireland. They are listed as from Fintona, Donacavey, Co-Tyrone, but being Catholic it has proven extremely difficult to find anything in Ireland prior to their departure.