Hi there! I'm very curious about the surname O'Rear, which was a great grandfather's name. It's Irish and that's all I know. Do you know what other spellings there are (I'm guessing it was changed when he came to the USA), and can you tell at all where in Ireland someone came from by their last name? Does anyone know the history of the name and what it means? Is it at all related to Rhiordan? Thank you very much if you can help!