Otto III of Burgundy

Otto III (c.1218–19 June 1248), only son of Otto I of Merania and Beatrice II of Burgundy, succeeded as Count of Burgundy in 1231 and as last Duke of Merania in 1234. He married Elizabeth, daughter of Count Albert IV of Tyrol, but died childless.

Fighting the Wittelsbachs in Bavaria, he left Franche-Comté to King Theobald I of Navarre, raised Innsbruck to a town in 1239 and pawned the county to Duke Hugh IV of Burgundy in 1242. Opposing Emperor Frederick II earned him an imperial ban. Buried at Langheim Abbey, he left Burgundy to his sister Adelaide.