Hi, there is a village in Carmarthenshire:
"LLANVIHANGEL-AR-ARTH, or YEROTH (LLAN-FIHANGEL-AR-ARTH), a parish, in the union of NEWCASTLE-EMLYN, higher division of the hundred of CATHINOG, county of CARMARTHEN, SOUTH WALES"
I think this may be the Llanvihangell in question.
I would still like to have your comments!
Best Regards,
Llanfi