I see that John and Mary Ann Dickin had a daughter, Mary, baptised in Worthen on 30 Jan 1816, which is a near match for the 1841 census.
I also see that a John and Mary Ann had children in Guilsfield:-
Charles Robert Dicken, of Trawscoed, on 27 Jul 1823
Sarah Maria Dicken, of Trawscoed, on 6 Oct 1825
Like the baptism of Mary, John was a farmer.
They both married in Guilsfield:-
Charles (signed as Dickin) to Ann Parry on 29th March 1845
Sarah (signed as Dickin) to David Roberts on 24th March 1845
David