Anthony Philip Coyne : Short Biography

My great-grandfather Anthony Philip Coyne was the son of John Coyne and possibly Nora O'Keeffe who is listed as his mother on his death certificate. He was born in 1855 or 1858 and emigrated from Ireland about 1880-1882 and settled in Chicago, Illinois. He worked as a laborer. He married my great-grandmother Bridget McHugh from Mayo in 1883 at Our Lady of Sorrows in Chicago. He spoke Irish as his first language and did not read or write English according to the 1930 Chicago Census. He had two surviving children. One is my grandmother Catherine Coyne Murphy. My great-grandfather lived with my father, his siblings, and their mother from 1927 until his death in 1941. Anthony's father John Coyne remarried Bridget Sullivan from the Derrylough /Cloonluane Area in 1866 or 1868. I am trying to find their marriage certificate to see if he indicated "previously married or widowed". No luck yet. They had 9 children; 8 surviving according to the 1911 Irish Census.We know that my great-grandfather was in contact with his nephew Philip Henry Coyne, the son of his half-sister Margaret Coyne (born 1870). My dad also spoke of another cousin, John Bernard Coyne who was a Jesuit priest and talk at St. Mary of the Lake seminary outside of Chicago. His nephew Philip Henry Coyne settled in Hull, MA and may have had a bar in Boston. I am in touch with his grandchildren. We may have other Coyne relations in the Middlesex, MA area who would be the other children of Margaret and Patrick Coyne. I am trying to find out about my great-grandfather's early life in Derrylough/Derryinver/Cloonluane area but there are no records. I am wondering if it was not customary at the time for children of previous marriages to live with the new wife and their children. I am trying to find out what happened to his mother if Nora O'Keeffe is his mother, and if he had any full siblings with Nora and John. I've been told that O'Keeffe is not a common Connemara name. I cannot find records of her at all.