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 Ahithophel
    brother of insipidity or impiety, a man greatly renowned for his
    sagacity among the Jews. At the time of Absalom's revolt he
    deserted David (Ps. 41:9; 55:12-14) and espoused the cause of
    Absalom (2 Sam. 15:12). David sent his old friend Hushai back to
    Absalom, in order that he might counteract the counsel of
    Ahithophel (2 Sam. 15:31-37). This end was so far gained that
    Ahithophel saw he had no longer any influence, and accordingly
    he at once left the camp of Absalom and returned to Giloh, his
    native place, where, after arranging his wordly affairs, he
    hanged himself, and was buried in the sepulchre of his fathers
    (2 Sam. 17:1-23). He was the type of Judas (Ps. 41:9).

 Ahithophel, brother of ruin or folly