Kleinertz
Kleinertz is the family name of the following people:
- Alexius Kleinertz (1831–1903), German history painter
- Everhard Kleinertz (* 1939), German historian and archivist
- Hanns Kleinertz (1905–1989), German composer, conductor, conductor, music director and music teacher
- Rainer Kleinertz (* 1958), German musicologist