Chamberlain in the Bible

An officer of a king

2 Kings 23:11 And he took away the horses that the kings of Judah had given to the sun, at the entering in of the house of the LORD, by the chamber of Nathanmelech the chamberlain, which was in the suburbs, and burned the chariots of the sun with fire.
Esther 1:10-15 On the seventh day, when the heart of the king was merry with wine, he commanded Mehuman, Biztha, Harbona, Bigtha, and Abagtha, Zethar, and Carcas, the seven chamberlains that served in the presence of Ahasuerus the king, 11 To bring Vashti the queen before the king with the crown royal, to shew the people and the princes her beauty: for she was fair to look on. 12 But the queen Vashti refused to come at the king's commandment by his chamberlains: therefore was the king very wroth, and his anger burned in him. 13 Then the king said to the wise men, which knew the times, (for so was the king's manner toward all that knew law and judgment: ...
Esther 2:3-21 And let the king appoint officers in all the provinces of his kingdom, that they may gather together all the fair young virgins unto Shushan the palace, to the house of the women, unto the custody of Hege the king's chamberlain, keeper of the women; and let their things for purification be given them: 4 And let the maiden which pleaseth the king be queen instead of Vashti. And the thing pleased the king; and he did so. 5 Now in Shushan the palace there was a certain Jew, whose name was Mordecai, the son of Jair, the son of Shimei, the son of Kish, a Benjamite; 6 Who had been carried away from Jerusalem with the captivity which had been carried away with Jeconiah king of Judah, whom Nebuchadnezzar the king of Babylon had carried away. ...
Esther 4:4-5 So Esther's maids and her chamberlains came and told it her. Then was the queen exceedingly grieved; and she sent raiment to clothe Mordecai, and to take away his sackcloth from him: but he received it not. 5 Then called Esther for Hatach, one of the king's chamberlains, whom he had appointed to attend upon her, and gave him a commandment to Mordecai, to know what it was, and why it was.
Acts 12:20 And Herod was highly displeased with them of Tyre and Sidon: but they came with one accord to him, and, having made Blastus the king's chamberlain their friend, desired peace; because their country was nourished by the king's country.
Also Romans 16:23.

⇒Bible Encyclopedia for CHAMBERLAIN.