Joachim I Nestor was a Prince-elector of the Margraviate of Brandenburg (1499–1535), the fifth member of the House of Hohenzollern. His nickname was taken from King Nestor of Greek mythology.
- Occupation
- ruler
- Position held
- Prince-Elector, Margrave of Brandenburg
- Citizenship
- Germany
- Born
- February 21, 1484, February 24, 1484
- Died
- July 11, 1535