Looking for my Woolsey ancestors in Portadown

My name is Peter Woolsey and I am a seventh generation Canadian with Irish ancestry. John William Woolsey was my ancestor who emigrated from Portadown, Ireland, to Quebec City, Canada, in the early 1760's. I would really like to learn more about my Woolsey ancestry in Ireland. The ancestral information that I currently have is as follows:

• John William Woolsey (1738 – 1783) emigrated to Quebec City, Canada, in the early 1760's.

• His parents lived in Portadown, County Armagh, Ireland. I know this because the diary written by Darley Woolsey (grandson of John William Woolsey) when he traveled to Europe in 1822-1823, clearly states “At Portadown, I was shown the house of my great grandparents”. (But I am not sure if they lived in the parish of Seagoe or Dumcree.)

• John William Woolsey had a brother and two sisters, as follows:

• Robert Woolsey (1741–1812) who emigrated to Quebec City, Canada, together with his brother in the early 1760's.

• Sarah Woolsey who married George Woodhouse and they lived in Emmyvale, Ireland.

• Elizabeth Woolsey who married a Mr. Stewart of Belfast.

• The maiden name of their mother was most likely “O'Brien”. The reason why is because a silver “Caudel Cup” manufactured in Dublin in approximately 1737 shows a Woolsey coat-of-arms on one side and an O'Brien coat-of-arms on the other side. We believe this was a wedding gift. John William Woolsey was born the next year. This Caudel Cup has been dutifully passed down to the oldest sibling of each subsequent Woolsey generation. (My older brother inherited it and he recently donated it for display at the Canadian National Art Gallery in Ottawa.)

• John William Woolsey's father's first name may have been Meredith … but I am not sure of this.

This is all the information that I presently have. But I dearly hope that there are enough clues above to discover much more about my Woolsey family ancestry in Ireland.