When John Thomas was born about 1705, in Llanelly, Carmarthenshire, Wales, his father, Guilielmus Thomas, was 25 and his mother, Catherine Williams, was 20. He married Mrs Johannes Thomas about 1730, in Llanelly, Carmarthenshire, Wales. They were the parents of at least 1 daughter.
English, French, German, Dutch, Danish, and South Indian: from the medieval personal name, of Biblical origin, from Aramaic t’ōm’a, a byname meaning ‘twin’. It was borne by one of the disciples of Christ, best known for his scepticism about Christ's resurrection (John 20:24–29). The th- spelling is organic, the initial letter of the name in the Greek New Testament being a theta. The English pronunciation as t rather than th- is the result of French influence from an early date. In Britain the surname is widely distributed throughout the country, but especially common in Wales and Cornwall. The Ukrainian form is Choma. It is found as a personal name among Christians in India, and in the U.S. is used as a family name among families from southern India.