Find the Descendants of Mary Trimble George Sayers of Pomeroy 1867

I am hoping to find the descendants of Mary (nee Trimble)born in 1833 & George Sayers who married in 1867, Mary was from Pomeroy, in Co. Tyrone. Mary had 6 brothers and 2 sisters, her parents were Andrew (born 1804)and Hannah (nee Montgomery)born 1810 and married in 1830, they had 9 children and 40 grandchildren, I have descended from one of them.
Robert.