Buddhist Dictionary of Pali Proper Names by G P Malalasekera
arunapāla
Arunapāla:A king of thirty-five kappas ago,a former birth of Kanikārapupphiya Thera (who is evidently identical with Ujjaya,Ap.i.203).In the Theragāthā Commentary (i.119) he is called Arunabala.