Thomas m. Aramaic תאומא or תאמא 'twin', the epithet of one of the Twelve Apostles.
The name of one of the twelve apostles, a 12th C English saint, two 13th C English saints, a 13th C Italian saint, and a 14th C Dutch saint. Wycliffite Bible (1395): Thomas.
The English diminutives Thom, Thome, Thomlyn, Tom, and Tome are witnessed in 1379 in the relational bynames Thomsoñ (WRYPT1 p. 130), Thomeson (WRYPT1 p. 22), Thomlynwyf' (WRYPT1 p. 9), Tomsoñ (WRYPT1 p. 287), and Tomedoghter (WRYPT1 p. 160).