Ive finally hit on the death cert for Catherine Hagan. She was born on April 10 1867 in the "Kerry Patch", an Irish settlement in St. Louis Missouri. According to the cert, Her father was James Hagan. Her mother was Mary Igoe (?) Both were born in Ireland. according to the 1870 census she had a sister named Ann. By the 1880 census, the family included:James Hagan
Mary Hagan
and the children: Catherine 13, Anne 11, Mary 9, Michael 8, Elisa (elizabeth?) 7, John 5, Thomas 4, and James Hagan's brother Michael Hagan 45
still looking for the O'Hagan connection. But I'm very excited about the info I have up to this point