Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
Nahash
Usage: A man of the Ammonites living at the time of United Monarchy, first mentioned at 1Sa.11.1 § Nahash = "serpent" 1) a king of the Ammonites during the time of king Saul 2) the father of Abigail, the mother of Amasa, the commander of Absalom's army