Boniface, the name of nine Popes. B. I., pope from 418 to 422, assumed the title of First Bishop of Christendom; B. II., pope from 530 to 532; B. III., pope for 10 months, from 607 to 608; B. IV., pope from 608 to 614; B. V., pope from 617 to 625; B. VI., pope in 896; B. VII., pope from 974 to 985; B. VIII., pope from 1294 to 1303, a strenuous assertor of the papal supremacy over all princes, and a cause of much turmoil in Europe, provoked a war with Philip the Fair of France, who arrested him at Anagni, and though liberated by the citizens died on his way to Rome; B. IX., pope from 1389 to 1405, the first pope to wear the Triple Crown.