|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).
Int. Standard Bible Encyclopedia
me-mu'-kan (memukhan; derivation unknown but probably of Persian origin (Esther 1:14, 16, 21)): One of "the seven princes of Persia and Media, who saw the king's face, and sat first in the kingdom." Ahasuerus consults these men, as those "that knew law and judgment," as to the proper treatment of the rebellious Vashti. Memucan is the spokesman of the reply. He recommends Vashti's deposition so that "all the wives will give to their husbands honor, both to great and small." This advice is adopted and incorporated into a royal decree-with what success is not said.
Memucan (3 Occurrences)
Esther 1:14 and the next to him were Carshena, Shethar, Admatha, Tarshish, Meres, Marsena, and Memucan, the seven princes of Persia and Media, who saw the king's face, and sat first in the kingdom), (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
Esther 1:16 Memucan answered before the king and the princes, "Vashti the queen has not done wrong to just the king, but also to all the princes, and to all the people who are in all the provinces of the King Ahasuerus. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
Esther 1:21 This advice pleased the king and the princes, and the king did according to the word of Memucan: (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)