Thanks for your reply Slowhands.

I probably should have mentioned that there are 2 Keziah Llewellyn's. The marriage you have found is for a younger Keziah, she is born in 1833 and is my gg grandmother.

The marriage I was looking for in 1852 was for a Keziah llewellyn born about 1811 / 1812. I am trying to find out if the two are related. Both these marriages are on the Familysearch website.