G4939
σύντροφος
brought up with
σύν-τροφος, -ου, ὁ (συντρέφομαι, to be brought up together) [in LXX: 3Ki.12:24, 1Ma.1:6 R, 2Ma.9:29 * ;] __1. prop., one nourished or brought up with, a foster-brother: Act.13:1 EV. __2. In Hellenistic usage, as a court term, an intimate friend of a king (see Deiss., BS, 305, 310 f.): Act.13:1 (cf. also MM, xxiv).† (AS)
The KJV translates G4939 in the following manner:
with (2x)
Full Thayer's lexicon entry
σύντροφος — sýntrophos
σύντροφος, συντροφου, ὁ (συντρέφω) (from Herodotus down), "nourished with one (Vulg.collactaneus (English foster-brother)); brought up with one; universally, companion of one's childhood and youth": τίνος (of some prince or king), Act 13:1. (1Ma 1:6; 2Ma 9:29; Polybius 5, 9, 4; Diodorus 1, 53; Josephus, b. j. 1, 10, 9; Aelian v. h. 12, 26.)
1 occurrence