Francis Blacker or Blackett of Armagh, Ireland
Francis Blacker was born in Armagh, Ireland about 1845, the son of Valentine Blacker. He married Catherine English in Drumcree, Armagh in 1860 and at least two of their children were born there. By 1874, however, he had moved to Jarrow, Co. Durham and had adopted the name of Blackett, and at least three further children of him and Catherine were born there with the surname of Blackett.