Phraates IV (juga disebut Frahad IV; Parthian: 𐭐𐭓𐭇𐭕code: xpr is deprecated Frahāt) adalah Raja DirajaKekaisaran Partia dari 37 sampai 2 SM. Ia adalah putra dan penerus dari Orodes II (m.57–37SM), dan menerima takhta setelah kematian saudaranya Pacorus I. Phraates IV kemudian membantai seluruh saudaranya, dan mungkin juga ayahnya. Tindakan tersebut menyudutkan orang-orang Armenia dan juga sejumlah bangsawannya, termasuk Monaeses, yang kabur ke triwiraRomawiMarkus Antonius, namun tak lama kembali dan berrekonsiliasi dengan Phraates IV.
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