Welcome back to Ireland Reaching Out!
I noticed that you posted a message back in May and I responded. http://www.irelandxo.com/ireland/kilkenny/ullid/message-board/baptism-18...
Ullid is a townland (575 acres) and a very small civil parish (about 2300 acres) in southern Co. Kilkenny. It lies just to the west of the civil parish of Kilmacow. The RC parish for both civil parishes would be Kilmacow.
Both civil parishes are considerably south of Kilkenny town. I agree with your second theory:
"Or my other theory George is there and leaves and goes to Kilkenny City to marry Margaret at her home Church."