It was common in Ireland to give the next child of the same gender the name of a deceased child. It is possible someone transcribed the birth and christening wrong. Five days would be quite normal as soon after first as possible. If the mother went to her mother's for the delivery the child
would be baptised at mother's church. Which often causes confusion. Often the marriage also took place in the bride's parish, making it look as though they moved.
There are Dillon's in the same Parish's Great Connell for instance..
The telephone book has several hundred Kelly's, but 90 in the Naas area. Woodland is mentioned, Newbridge. Same for
the name Dillon and 52 Floods.
In the Griiffith Valuation the townland of Clownings was in two Parish's Great Connell and Whitechurch which may have been emalgamated by now. However at the time 1853 two William Kelly's meet part of the description. As Christopher is not named after his father, it maybe his grandfather's first name. There are 8 Christopher's in 1853. www.askaboutireland.ie
Did Christopher have any children in Ireland as being born 1847 he would be having his own children by about 1867+. If so you should be able to find those on the websitewww.familysearch.org
Kildare also belongs to an Irish History Foundation. A pay website although not for profit. A birth record should give you the proper maiden name for mother. Plus the births of the other children
The first mother Bridget may have died and Elizabeth be a later mother and if she raised the children he may have considered her his mother!