Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
Ahithophel
Usage: A man living at the time of United Monarchy, first mentioned at 2Sa.15.12; father of: Eliam (H0463H) § Ahithophel = "my brother is foolish (folly)" a counsellor of David, grandfather of Bathsheba (cf 2Sa 11:3, 23:34), who joined Absalom in revolt against David, and committed suicide when Absalom did not heed his counsel