“Tob” means good

Tob: The land of, a place in which Jephthah took refuge when expelled from home by his half-brother, (Judges 11:3) and where he remained, at the head of a band of freebooters, till he was brought back by the sheikhs of Gilead. ver. 5. The narrative implies that the land of Tob was not far distant from Gilead; at the same time, from the nature of the case it must have lain out toward the eastern deserts. It is undoubtedly mentioned again in (2 Samuel 10:6,8) as Ishtob, i.e. man of Tob , meaning, according to a common Hebrew idiom, the men of Tob. After a long interval it appears again, in the Maccabaean history, 1 Macc. 5:13, in the names Tobie and Tubieni. 2 Macc. 12:17. No identification of the ancient, district with any modern one has yet been attempted.