'Eunuchs' in the Bible

Then Johanan the son of Kareah and all the commanders of the forces that were with him took from Mizpah all the remnant of the people whom he had recovered from Ishmael the son of Nethaniah, after he had struck down Gedaliah the son of Ahikam, that is, the men who were soldiers, the women, the children, and the eunuchs, whom he had brought back from Gibeon.