Chari-Found your posting and believe there is a connection. My ggg grandparents John and Catherine Riordan/Reardon came to Ontario in 1825 as part of Peter Robinson settlers on ship Brunswick. They were from Charleville County Cork Ireland and settled at Asphodel Peterborough County Ontario. Their only daughter Catherine married 1830 Morgan O'Brien (son of PR settler in Douro) I believe Morgan's mother was Mary Casey and Catherine's mother was Catherine Casey-sisters. There was also a Thomas Casey on the same ship as the O'Briens and may be the brother of Mary and Catherine. I have a lot of information on Catherine and Morgan's descendants. I have no information on the Riordan/Reardon family from 1825-1853 when they immigrated to the Saginaw MI area. I have a lot of information on Reardon family once they were in MI. Catherine's brother Thomas born 1820 is my gg grandfather. He married 1844 in Ontario to Ellen Cooney. Have not been able to find any information on the Cooney family who I believe immigrated to Ontario in the 1830's. I think Ellen's parents were Patrick and Ellen Cooney. I assume they were probably in the Peterborough area for Thomas and Ellen to have met and marry. Thomas and Ellen immigrated to MO and both are buried in Worth County. Thomas died in 1873 and Ellen died in 1915. Would be interested in exploring possible connections and share information. Hope to hear from you-Linda Rairdan DenBoer