4 occurrences in 4 dictionaries
Reference: Zethar
Fausets
One of Ahasuerus' seven eunuchs who brought Vashti before him (Es 1:10).
Morish
Ze'thar
One of the chamberlains at the Persian court. Es 1:10.
Smith
Ze'thar
(star), one of the seven eunuchs of Ahasuerus,
Es 1:10
(B.C. 453.)