Morgan of Monkton, Castlemartin, Pembrokeshire, Wales

Hi, interested in tracing Morgans in the above area. John Morgan born 1835 Cosheston and wife Mary born 1845 Landshipping moved down to Lambeth in London before1866 when son William Born. Think father could have also been a John born 1816 -Goodborough? Monkton, Wales. Any one know of things that may help, would be appreciated.   Brick Hall (house) Pembroke, has also been mentioned. Mary may have been his 2nd wife.