Hi Lyn - I imagine you've seen the records here -
http://freepages.genealogy.rootsweb.ancestry.com/~hughwallis/IGIBatchNumbers/CountyHere...
Plenty of Daniels in Whitchurch, some are sure to be decendants of Thomas
It's incomplete, and some say not accurate, but I've found quite a lot of accurate information using this list. Llangarren nearby has one Joan Ann Daniel baptised the daughter of Thomas and Ann, this is January 1671, so Daniels were about for quite a while. And there is a Betty Daniel baptised daughter of William and Mary in 1798 Ganarew which is just out of Whitchurch on the Monmouth road.
St Weonards have a list of Daniels for the early 1700's. These might be worth recording as there may be a link. cheers fred