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.

John II was Elector of Brandenburg from 1486 until his death, the fourth of the House of Hohenzollern. After his death he received the cognomen Cicero, after the Roman orator of the same name, but the elector's eloquence and interest in the arts is debatable.