Tarshish

A Persian, in the time of Exile and Return · Persia · named in 1 verse

Tarshish was one of the seven princes of Persia and Media who had access to King Ahasuerus's presence and held the highest positions in the kingdom.

From Easton's Bible Dictionary

A Sanscrit or Aryan word, meaning "the sea coast." (1.) One of the "sons" of Javan (Gen. 10:4; 1 Chr. 1:7).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

First named at Esther 1:14.

Esther 1:14 His closest advisors were Carshena, Shethar, Admatha, Tarshish, Meres, Marsena, and Memucan, the seven princes of Persia and Media who had personal access to the king and ranked highest in the kingdom.