1. Pope, served from 625 until his death in 638 CE. Was interested in conversion of the Anglo-Saxons and Celtics to Christianity. He was a shrewd and able administrator. Wrote a letter seemingly in support of Monothelitism for which he was posthumously declared a heretic at the Third Council of Constantinople at 680 CE. Modern Roman Catholic scholars contend he was not in favor of the heresy, but merely used ambigious language.

2. Any one of several Roman Emperors.