Did they come to the USA?If so do you know what year? In the years you list they could have been Presbyterian,Church of Ireland o Roman Catholic. There was a lot of traveling back & forth between Ireland Scotland and England.
Grandmother Holland was b in England-her family went to Ireland.
grandfather Holland had a niece who married a man from Scotland and when she died he sent his son to Scotland to raised by his parents.Never went back for him and he still lives in Scotland.
Grandfather Holland had a brother who went to England, married there and his family still lives there. So you can see that there was much movement between these 3 countries.
Give me some dates and I will see what I can do to assist firstname.lastname@example.org