Hello! My family is tracing our Cotter roots and are trying to find the parents/family of Mary Cotter and Richard Cotter, who family history tells us are brother and sister. We were told they came from Ireland, with Mary already married to Matthew Leahey, but just researched Census and found that Mary was born in OH before marrying Matthew Leahey (born in MO) in MO later in life. We have also found Richard Cotter was involved with Clarence King and geological expeditions to what is now known as Yosemite and have pictures of him on such journey. The approximate dates of birth are 1844/Richard and 1856/Mary A., the geological expedition was 1864. This has all led us to believe that The parents of Mary A. and Richard Cotter must have come from Ireland to have their children in OH. Do you know if any of your line eventually points to the Cotter's in OH? Thanks for your help, We're sending for birth records to try to find Mary's parents names but right now are at a stand still until then.