Gibson, of Stewardstown in Ireland

Brothers William Gibson, George Gibson and Robert Gibson emigrated to Pennsylvania from Northern Ireland, their parents unknown.

Three Gibson Brothers from Ulster, Ireland

According to the Gibson book, by Sarah D. Gibson, pg 12: "Robert and George Gibson, brothers, came from Stewartstown, in the province of Ulster, in the North of Ireland, to Pennsylvania before the year 1730. It is probable, that William Patrick, James, and John Gibson, who about the same time took up land, belonged to the same family." Most of this information comes from Sarah's book. She does not list the father of Robert, and George Gibson, but she does include a William Gibson as their brother. (Please be aware, that Sarah's book is not perfect, there are some mistakes. Where she did not know the actual birthdates of people, she guesstimated every two years. She admits that in here preface too.) This is a summary.

1. Robert*, (abt 1700-1754), m. Mary McCellan.
2. George*,(abt. 1704-1761), m. Martha Deviney.
3. William*, (bef.1717-1771), m. Margaret Unknown.

   ---

https://www.familysearch.org/tree/person/memories/GSD2-8ML

Robert Gibson was born 8 February 1699 at Six Miles Creek, Stewartstown, County Tyrone, Ulster Province, Ireland.He married Mary McClelland about 1720 in Ireland. Mary was born about 1700 in County Donegal, Ulster Province, Ireland.

References

1. https://www.familysearch.org/tree/person/details/GSD2-8ML
2. https://www.werelate.org/wiki/Person:Unknown_Gibson_%2824%29