Zethar
The name Zethar means “he that examines or beholds”.
Smith's Bible Dictionary 1863
(star), one of the seven eunuchs of Ahasuerus, (Esther 1:10) (B.C. 453.)
International Standard Bible Encyclopedia 1915
ze'-thar (zethar; Oppert, Esther, 25, compares Persian zaitar, "conqueror"; see BDB; Septuagint Abataza): A eunuch of Ahasuerus (Es 1:10).