I do appreciate your frustration but
have you read the numerous previous threads on this topic ? Advice has been given over and over again that the OP has not followed. How can you help in a situation like that ?
Indeed I have , davidft. I had to in an effort to find out all that was 'known' about said Thomas and what had been said before. Not a good idea to keep starting new threads about the same thing.
Have just read even earlier threads in 2009/2010 - feel I'm going round in circles. So, back then,
I suspect he was probably born in Ireland.
Hmmmm 
http://www.rootschat.com/forum/index.php?topic=449757.msg3118649#msg3118649
My great grand father was Thomas Kavanagh sone of John and Catherine nee Carton, born Annamoe 1865 with brother Lawrence born 1866 and later a brother John but no idea where he was born as yet.
John and Catherine came to England but don't know when and Thomas married in Co Durham in 1894 but, after over 10 years, i have never been able to find his death anywhere.
1. Where has the information re. both his parents names come from?
2. Where has the information of his birth of 1865 in Annamoe, Wicklow come from? (OP is now looking at Thomas' born Durham?? - says marriage certificate gives John as a labourer in 1894 but states in other threads he was a Coal Miner and I'm getting more confused by the minute)?
There is no trace of Thomas on 1891 Census so have only the given marriage details to go by - we need the
exact details given at time of his marriage - is this just from the GRO marriage certificate or is it the actual RC marriage entry which gives more detail I believe.
Back to basics I feel - starting with what is 'known' (or stated). I'd love to be able to help but conflicting information is making it so difficult.
Annette