"Vonones II was a Parthian prince who ruled as king of Media Atropatene and briefly as king of the Parthian Empire.
Vonones was not from the ruling branch of the Arsacid royal family. His father was a Dahae prince, who was most likely descended from the former Arsacid monarch Mithridates II (r. 124–88 BC), whilst his mother was a daughter of the Arsacid King of Kings Phraates IV (r. 37–2 BC). Vonones II´s brother was the Parthian King Artabanus II.
From about 11 AD until 51 AD, Vonones II ruled as king of Media Atropatene, a period about which little is known." - (en.wikipedia.org 18.10.2020)
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