Smith's Bible Dictionary
Git'tites, The. (belonging to Gath). The 600 men who followed David from Gath, under Ittai, the Gittite, 2 Samuel 15:18-19, and who probably acted as a kind of body-guard. Obed-edom, "the Gittite" may have been so named from the town of Gittaim in Benjamin, 2 Samuel 4:3; Nehemiah 11:33, or from Gath-rimmon.
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Smith, William, Dr. Entry for 'ittites The'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/i/ittites-the.html. 1901.