Jim - thank you for sharing your research with me. I am most appreciative. I am still searching for Hugh - who I am quite sure was born in 1830 or 1831, and I'm also pretty certain that he used the spelling Dinan, although my family in MI uses Dinnan, Dinan or Dining. In your research have you found the largest concentration in Clare? I was also told to check out Cork, as well. Have you had most of your success on the Internet, or through libraries and microfilm? I'm new at this, so would appreciate any advice.