masc. proper name, from Old French Barthelemieu, from Latin Bartholomæus, from Greek Bartholomaios, from Aramaic (Semitic) bar Talmay, literally "son of Talmai," from the proper name Talmai, literally "abounding in furrows." One of the twelve Apostles, his festival is Aug. 24. On this date in 1572 took place the massacre of Protestants in France. London's popular Bartholomew Fair was held annually around his day from 1133 to 1855.
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Harper, D. (n.d.). Etymology of Bart. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/Bart