‘Alfonso the Slobberer,’ ‘Eystein the Fart’ and 10 more kings with unfortunate nicknamesDonald Trump reckons William the Conqueror had the “coolest name he’d ever heard”, apparently. ‌Constantine the Dung : Constatine V was another Byzantine emperor, who ruled in the 8 th century. Ivaylo the Cabbage : Peasant rebel leader Ivaylo briefly became tsar of Bulgaria in the 13 th century. Eystein the Fart: No-one knows exactly how Eystein Halfdansson, an 8 th century king in Norway, got his nickname, but we can imagine. Charles the Bald : You’d think this 9 th century West Francia king had a smooth pate, but paintings show him with hair, so maybe it was ironic.