- Frederick I, Frederick Barbarossa, Barbarossa - Holy Roman Emperor from 1152 to 1190; conceded supremacy to the pope; drowned leading the Third Crusade (1123-1190)
--1 is a kind of Holy Roman Emperor
- Barbarossa, Khayr ad-Din - Barbary pirate (died in 1546)
--2 is a kind of corsair, Barbary pirate