Master mariner William Thomas 1770-1841, married Mary Jones 1772-1852. Their son David b.1817, became a mariner and he married Anna Maria Roberts 1816-46, a farmers daughter. Tragically Anna died twelve days after giving birth to a son William Thomas. William Thomas1846-1908, served as mate on the sailing vessels Nellie, Cassia, Janet and Mary, Eleanor, Charlotte, Helena, Messenger, Jane Herbert and the Cantheus. He gained his master’s certificate in September 1868, forty years later he drowned in the North Sea whilst serving as second mate on the steamer Kirkwall . He had married Jane Jones in 1873, the daughter of Captain John Jones and his wife Margaret. They had four children one of whom, John David Thomas 1875-1900, was lost at sea when the Ocean Belle sank with all hands off the coast of Denmark.
The Borth Thomas mariners were major players in Aberystwyth's maritime story as witnessed in the researches of Joy Hamer, O.B.E., which resulted in her publication Mother's Aberystywyth Mariners. I shall merely list the ships they commanded and sailed on whilst I highly recommend Hamer's book for further reading about the Borth Thomas line. This family's maritime exploits may have started as far back as the early 1700's at Borth. They were involved with the following sailing vessels: Confidence, Eagle, Eliza Jenkins, Ocean Belle, Hannah Jane, Star of the Isles, Elizabeth Davies, Burnham, Traveller, Morning Star, Belle of Lagos, Cambrian Belle, Gleneagle, Jane Farlie, Friendship, Diligence, Waterloo, Robust, Ocean Queen, Britannia, Radnagore, Exchange, Excel, Martha Anne Jones, Ocean Dart, Vindex, Jane Morgan, Castle, John and Ann, Messenger, Rock Light, Rachel Louise, Dana, Llewellyn, John Elias, Rheidol Hall, Sharpenton, Comment, Henrietta, E J Thomas, Anasco, Atalanta, Lothair, Lothius, Magnolia, Jane Herbert, Crusader, Dauntless, James, Polly and Emily, Rheidol Valley, Pacific, Hetty Ellen and Nymph. There were well over a dozen master mariners who contributed to Aberystwyth's nautical history.
Other seafaring Thomas’s were Edward b.1830, who was mate on the brigantine Helen of Newport in 1861, and Thomas Thomas who was master of the 134 ton schooner Naiad of Llanelli. Another family descendant Captain David Thomas b.1870, of London Cottage was for a time in the Orient where he often met up with Captain John Davies of Maesteg House. Captain Thomas was employed by a company in Australia when World War 1 broke out. He took command of the S.S. Kinross, bound for the U.K. As he approached British waters in May of 1917, a German submarine ordered them to the boats and sank their vessel. He and his crew landed safely at St Ives, Cornwall. Captain Thomas went on to command the S.S. Seistan from 1921-24, and in the 1930’s he was master of the S.S. New Mathilde.