Kartam was a descendant of Kuji of Colchis from his marriage on a sister of Pharnavaz I of Iberia. Kartam was adopted by King Pharnavaz II. He married Pharnavaz's daughter and had two sons: Pharasmanes I and Mithridates. Kartam died in 33 BC.
- Cyril Toumanoff, Les dynasties de la Caucasie chrétienne de l'Antiquité jusqu'au XIXe siècle: Tables généalogiques et chronologiques, Rome, 1990, p. 424-425
- Rapp, Stephen H. (2003), Studies In Medieval Georgian Historiography: Early Texts And Eurasian Contexts, p. 284. Peeters Bvba ISBN 90-429-1318-5.