Apharsachites in the Bible

The copy of the letter that Tatnai, governor on this side the river, and Shethar-boznai, and his companions the Apharsachites, who were on this side the river, sent to Darius the king.

Therefore Tatnai, governor beyond the river, Shethar-boznai, and your companions the Apharsachites, who are beyond the river, be ye far from thence: