Lewis & Short

Stōbi, ōrum, m., an ancient and important city of Paeonia in Northern Macedonia, Liv. 33, 19, 3 Weissenb. ad loc.; 39, 53, 15; 40, 21, 1: oppidum Stobi civium Romanorum, Plin. 4, 10, 17, § 34.
The inhabitants are called Stōbenses, ĭum, m., Dig. 50, 15, 8, § 8.