Memucan

A man, in the time of Exile and Return · named in 3 verses

the name means Dignified Easton's Bible Dictionary

Memucan, a wise prince who advised King Ahasuerus to depose Queen Vashti.

From Easton's Bible Dictionary

Dignified, one of the royal counsellors at the court of Ahasuerus, by whose suggestion Vashti was divorced (Esther 1:14, 16, 21).

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.
Esther 1:16 And in the presence of the king and his princes, Memucan replied, “Queen Vashti has wronged not only the king, but all the princes and the peoples in all the provinces of King Xerxes.
Esther 1:21 The king and his princes were pleased with this counsel; so the king did as Memucan advised.