[or Astolphus, Astulphus].  King of the Lombards from A.D. 749 or 750 to 756; seized Ravenna and the Pentapolis in 752; then threatened Rome, but was defeated in 754 by Pepin, king of the Franks, who entered the war at the earnest solicitation of the pope. Pepin obliged Aistulf to surrender Ravenna and the Pentapolis, which were at once ceded to the pope, whose temporal supremacy may be said to have dated from this period.