Musäus is a German surname derived from the Greek Musaeus.
People Hans Musäus (1910–1981), actor Johann Daniel Heinrich Musäus (1749–1821), jurist Johann Karl August Musäus (1735–1787), short story writer Johannes Musaeus (1613–1681), theologian Peter Musaeus (1620–1674), theologian Simon Musaeus (1521/1529–1576/1582), theologian