Otto, known as the Merry, was Duke of Austria and Styria from 1330, as well as Duke of Carinthia from 1335 until his death. A member of the House of Habsburg, he ruled jointly with his elder brother Duke Albert II.
- Occupation
- sovereign
- Position held
- duke
- Born
- July 23, 1301
- Died
- February 17, 1339, February 17, 1339
