I cannot make any connection except the names and place are coincidental.
My GG grandfather, Leyson Hopkin Davy (1782-1872), was born in Cardiff, Wales to Jonathon & Mary Davy. Leyson married Elizabeth Lawrence in St Brides Minor in 1832. They had 9 kids in St Brides Minor (I have details if required but they began in 1822). As you have a photo I will contact you direct and attach a pic of Leyson Hopkin Davy after he head retired from the HEIC and migrated to NZ (in 1841). He left behind his daughters, wife having died.