You are welcome, his first son if not William will be called after his father.
Clonoulty was both a Parish and a townland and could be in either Cashel & Tipperary Poor Law Union.
The Tithe Applotments don't show any Heffernan's in 1822-1839 in Parish Cloulty but if William was living at home until he left he won't show up himself. Father's divided up their holdings between the sons till they got so small it made things difficult or the children took up occupany elsewhere and even possibily out of the Parish. I don't think it is a matter of the eldest son getting the inheritance as none of the land was owned by the occupier and I think that was for wealthy families. Usually if the man who leased the land died his widow would ask the landlord permission to take over the lease and put it in her name and that is about the only time you see women's name on a lease.