Bartholomew m. Aramaic בר + תלמי 'son of Talmay'.
The patronymic of Nathaniel, one of the Biblical disciples, by which he was more commonly known, as well as of an early English saint. Wycliffite Bible (1395): Bartholomeu, Bartholomew.
The English diminutive Bate is witnessed in 1379 in the relational byname Batewyf' (WRYPT1 p. 31).