Morgan, Thomas (d. 1743), theological and medical writer, was of Welsh origin and is said to have been ‘a poor lad in a farmer's house’ (Protestant Dissenter's Magazine, 258) near Bridgwater, Somerset. Of his parents nothing is known. In his youth he showed enough promise for a dissenting minister, John Moore (1642?–1717), to give him a free education, the cost of his living being provided by his friends. He was made Independent minister at Bruton in Somerset but was ordained by the Presbyterian minister John Bowden at Frome in 1716 and was subsequently minister of a congregation at Marlborough, Wiltshire. He married Mary, eldest daughter of Nathaniel Merriman, a prominent dissenter of Marlborough.