Have you been able to trace your great grandparents or great great grandparents? Our Michael and Bridget were born in Ireland sometime around 1820, county unknown. I have a bit more info on their children who were all born in IL: John Coady married Mary Butler in Christian Co IL in 1879. Patrick Coady was reported to be living in OK in 1903 when his mother died. We believe he died between 1903 and 1922. James Coady was reported to be living in St. Louis MO in 1903 and living in Texas in 1922. Martin C. Coady married Ellen Harlan Cook in Sangamon Co IL in 1897 and around 1902 moved to Estherville IA. He died there about 1939. Michael N. Coady married Ellen Waters in 1887 in Sangamon Co IL. He died there in 1922. Mary Ann Coady married Peter Cashen Jr. in 1897 in Sangamon Co IL. She died about 1912.
We have so far been unable to trace Michael and Bridget prior to 1863 when Michael bought farm land in Christian Co IL. Because there were several Coady families in the area who were also born in Ireland, they may have all been related, either siblings or cousins, but I haven't yet been able to make the connections.