Phraates I of Parthia

Phraates I of Parthia (Persian: فرهاد يکم‎), ruler of the Parthian Empire from 176-171 BCE, succeed his father Phriapatius (191-176 BCE) on the throne. Died relatively young, and appointed as his successor not one of his sons, but his brother Mithridates I (171-138 BCE).
He subdued the Amardians (lat. Amardis), mountaineers occupying eastern portion of the Elburz range, south of the Caspian Sea.