Hi TigerOC,
I think our Llewellins may possibly be related, but I'm a bit stuck with them, so not sure! Mine are certainly connected to Whitchurch.
I have an Elizabeth Llewellin marrying George Ikin in Whitchurch 1770. For ages I couldn't find a baptism for Elizabeth, but finally found her in Malpas in 1746, a neighbouring parish over the county border in Cheshire. She's the daughter of Thomas & Sarah.
I think Thomas and Sarah then moved to Whitchurch (where I think Thomas came from, baptised 1731) and had the following siblings to my Elizabeth:
John 1750; Thomas 1751 (died); Thomas 1753; William (1755); Mary 1757 (died); Mary 1758; Eleanor and Robert 1760 (Robert died); James and Robert 1762.
I'm wondering if John (1750) could be the father of your George? Tentative, I know, but possible. What do you think?
Unfortunately, I haven't found the parish records for this area to be that accessible, so it's very difficult to get any further back.
Jill