I have distant Hehirs in my Malone family tree. In 1872 a John Malone married a Sarah Hehir in Kilysert Parish. John was from Shanneka More in Kilfidane/Cranny Parish. Sarah's father was named Martin. The first child to this couple had a Simon and Bridget Hehir as her godparents. Could you ask your grandfather if there is any connection. John and Sarah both stayed and died in Shanneka More.