Octar or Ouptaros was a Hunnic ruler. He ruled along brother Rugila according to Jordanes in Getica, "...Mundzucus, whose brothers were Octar and Ruas, who were supposed to have been kings before Attila, although not altogether of the same [territories] as he". Their brother Mundzuk was father of Attila, but he was not a supreme ruler of the Huns. According to Priscus their fourth brother Oebarsius was still alive in 448 AD. Their ancestors and relation with previous rulers Uldin and Charaton are unknown.
Octar, identified with Ouptaros, according to Socrates of Constantinople died in 430 near Rhine, "For the king of the Huns, Uptaros by name, having burst asunder in the night from surfeit, the Burgundians attacked that [the Huns of Uptaros] people then without a leader; and although few in numbers and their opponents many, they obtained victory".
The name is recorded in two variants, Greek Ούπταρος (Ouptaros), and Latin Octar. The change from -ct- to -pt- is characteristic of Balkan Latin. Omeljan Pritsak derived the name from Turkic-Mongolian word *öktem (strong, brave, imperious; proud, boastful; pride) and verb ökte- / oktä- (to encourage). The deverbal Turkic-Mongolian suffix m is replaced in Turkic by z while in Mongolian by ri. The reconstructed form is appellative *öktä-r.
- Maenchen-Helfen, Otto J. (1973). The World of the Huns: Studies in Their History and Culture. University of California Press. ISBN 9780520015968.
- Pritsak, Omeljan (1982). The Hunnic Language of the Attila Clan (PDF). IV. Cambridge, Massachusetts: Harvard Ukrainian Research Institute. ISSN 0363-5570.
Joint rule with Rugila
? – 430