Peter Otto Rosenørn was a Danish nobleman who served as county governor of Nykøbing County on Falster. He is the progenitor of all living members of the Rosenørn family. His 820-page diary, which covers the period from just before he turned 17 until his death, is the most comprehensive Danish diary from the first half of the 18th century.
- Occupation
- judge, politician, service worker, amtmann
- Citizenship
- Kingdom of Denmark
- Born
- June 24, 1708
- Died
- February 7, 1751
