Hi, I was interested to see your name was Tim.
My Hehir ancestor was Timothy Hehir from Killow, Clareabbey. I believe he is listed in Griffiths Primary Valuation of 1855 as Thaddeus. He possibly had brothers named Patrick and Andrew. Timothy was married to Ann McMahon, several of their children (Bridget, Susan, Anna Maria and John) immigrated to Australia. There was also a sister Elizabeth and brothers Michael and Thomas (possibly went to the USA).