We live down that way but I had never heard of him. Fascinating story...
It looks like the Llewellyn Maddox who was listed as Boatswain on the 'Mary Moore' with Captain John Maddox in 1891 may have been his brother.
Llewellyn (born Fishguard: Mariner Mercantile), his wife Mary, and brother John (born Fishguard: Mariner Mercantile) are listed on the 1891 Swansea census under 'Maddex'.
Not sure about Enoch Maddox as yet...
Cheers, Anne