| Phriapatius | |
|---|---|
| "King of Parthia" | |
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Coin of Phriapatius.
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| Reign | 185–170 BC |
| Predecessor | Arsaces II |
| Successor | Phraates I |
| Born | Unknown |
| Died | 170 BC |
| Issue |
Phraates I Mithridates I Artabanus II Mithridates II (possibly) |
| 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).