I suspect that Thomas and Hannah Roberts may not have arrived in Woolaston until about 1800, as the earliest references I can find in the registers are the burial of their first daughter Mary 11th January 1802 and the baptism of Elizabeth 17th October 1802.

However in a parish census about 1818 is the following:
Thomas and Hannah Roberts
Thomas 21
William 19
Betsy 15
Hannah 13
James 10
Mary 7

So I think you can add William to the family!

Thought the following inscription in the churchyard might also be of interest:
In MEMORY of / Thomas Roberts / who died Febry 18 1829 Aged ... /
A loving Husband and a Father dear / A Faithful Friend lies buried here.

Hope this helps. Biddy