Thomas Johnes was a prominent Welsh landowner and agricultural reformer in the 18th and early 19th centuries. He is best known for his work at Dolaucothi Estate in Carmarthenshire, where he implemented innovative farming techniques and improved land management practices. His efforts contributed to the advancement of agriculture in Wales. In addition to his agricultural contributions, Johnes was also a notable figure in the development of the Ceredigion area. He played a key role in promoting local industries and enhancing the region's economy. His legacy includes a commitment to sustainable farming and community development.