Phriapatius

Phriapatius
"King of Parthia"
Coin of Phriapatius.
Reign	185–170 BC
Predecessor	Arsaces II
Successor	Phraates I
Born	Unknown
Died	170 BC
Dynasty	Arsacid dynasty
Religion	Zoroastrianism

Phriapatius (Persian: فریاپت‎‎ /ˌfraɪəˈpeɪʃəs/) or Priapatius /ˌpraɪəˈpeɪʃəs/, sometimes called Phriapites /ˌfraɪˈæpᵻtiːz/, was the king of the Parthian Empire from 185 BC to 170 BC. He was the grandson of Tiridates I (246–211 BC), the brother of Arsaces I (250–211 BC), the founder of the Parthian Empire.

He ruled in the period following the invasion of Parthia by the Seleucid King Antiochus III (223–187 BC).