Looking for ancestors of Jeremiah Skehan

Hi all,  I have hit a wall trying to go back further than my 2nd great-great grandfather Jeremiah Skehan.  Here's what I think is accurate:  He was born around 1833 and I think (if this is him) he was baptised on Nov 18, 1833 in Cashel and Emly diocese. He married first Bridget Minahan on Feb 28, 1865 in Broadford, Limerick, Clare and then Hanora (Norah) Moloney in January 1877 also in Broadford Parish, Clare.   I think he died on March 21 1900 in Ahernia, Limerick. Norah died Aug 21 1908.  I'm having trouble finding the correct parents of Jeremiah. On his wedding registry he lists his father as Jeremiah (deceased) but on his baptism it looks like his parents are Jno. and Mary.  To further confuse things, there is another Jeremiah Skehan from the same area I think who ended up in Australia.   I would appreciate any help!