Not hostile - just losing patience as I've spent a considerable time looking through all my sources for you.
I know the area well, having lived there for the first 18 years of my life and visiting regularly until my parents died.
I can walk/see the the roads and areas that we are talking about.
The names that you have are not easy. The only known facts are that Athalia married from Preesegweene in 1839. Her father was given as John Evans, collier.
She was baptised in Chirk, with residence given as Penybryn - to John and Ann.
John and Ann might have married in Chirk in 1819
They had 3 other children baptised in Chirk, although their residence was always in Shropshire - Chirk Bridge or Preesegweene. Preesgween was the last residence on the baptism records in 1829.
They appear in 1841 in Preesgweene. John was always stated as a collier on the records and on this census.
After that, there doesn't seem to be a lead- have you checked freebmd for deaths in the Oswestry reg district? Although a John and Ann Evans will not be that easy

Gadget