Sinnion was a veteran of the Vandalic War. Noted for their strength and bravery, Sinnion and Balas led a group of 600 Massagetae auxiliaries (all mounted archers), at the Battle of Ad Decimum (September 13, 533).
He then became a leader of the Kutrigurs, succeeding Chinialon, between 551 and 558, after the Utigurs led by Sandilch had attacked the Kutrigurs. Having suffered great losses, the Kutrigurs made a peace treaty with Byzantine Empire, and 2000 Kutrigurs with their wives and children were led by Sinnion into the Empire's service and were settled in Thrace. The shelter provided to the Kutrigurs was not well received by Sandilch. He was succeeded by Zabergan.
- Maenchen-Helfen, Otto J. (1973). "Chapter IX. Language: 7. Names of undetermined origin". The World of the Huns: Studies in Their History and Culture. University of California Press. pp. 390, 420. ISBN 9780520015968.
- Curta 2015, p. 76–77.
- Martindale, John Robert (1971). The Prosopography of the Later Roman Empire, Volume 3. Cambridge University Press. p. 169. ISBN 9780521201605.
- Syvänne, Ilkka (2004). The Age of Hippotoxotai: Art of War in Roman Military Revival and Disaster (491-636). Tampere University Press. pp. 417, 418, 434. ISBN 9789514459184.
- Golden 2011, p. 140.
- Curta, Florin (2015). "Avar Blitzkrieg, Slavic and Bulgar raiders, and Roman special ops: mobile warriors in the 6th-century Balkans". In Zimonyi István; Osman Karatay. Eurasia in the Middle Ages. Studies in Honour of Peter B. Golden. Wiesbaden: Otto Harrassowitz. pp. 69–89.
- Golden, Peter B. (2011). Studies on the Peoples and Cultures of the Eurasian Steppes. Editura Academiei Române; Editura Istros a Muzeului Brăilei. ISBN 9789732721520.
|Leader of the Kutrigurs
fl. after 551–558