According to Pausanias, Cestrinus was upset when Andromache's son Molossus succeeded Helenus to the throne of Epirus. Taking a group of Epirotian volunteers, he claimed the region of Epirus north of the River Thyamis and it is because of him that the region was named Cestrine. According to another tradition, Cestrinus was king of Cimmerian Bosporus, being equated with King Genger.
- Pausanias, 1.11.2.
- Pausanias, 2.23.6.
- Pausanias, Description of Greece with an English Translation by W.H.S. Jones, Litt.D., and H.A. Ormerod, M.A., in 4 Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1918. ISBN 0-674-99328-4. Online version at the Perseus Digital Library
- Pausanias, Graeciae Descriptio. 3 vols. Leipzig, Teubner. 1903. Greek text available at the Perseus Digital Library.