Sforno on Genesis 14:1/ספורנו על בראשית י״ד:א׳

1ויהי בימי אמרפל מלך שנער, who was widely known as a powerful king in his generation and also later. During his lifetime the kings listed forthwith, i.e. Aryoch, king of Elassar, Kedorlaomer, king of Eylam, and Tidal, king of Goyim, jointly made war against Bera, etc.