I did find this marriage, which I dismissed but given the additional information by Ciderdrinker it might be worth following up.
David Davies widower
Marriage Date: Marriage 20 Oct 1770
Marriage Place: Llanllugan, Montgomeryshire, Wales
Residence Place: Llanwyddelan
Spouse: Catherine Davies spinster
Both signed x. Witnesses Ann Jones & Soloman Davies, he signed others on that record.
Colin