Johann Grabau
Johann Grabau is the name of the following people:
- Johann Andreas Grabau (1808 / 1809-1884), German cellist, see Andreas Grabau
- Johann Christian Lebrecht Grabau (1780–1852), German teacher and organist, see Lebrecht Grabau
- Johann Christian Lebrecht Grabau (1810–1874), German painter and etcher, see Christian Grabau
- Johann Wilhelm Heinrich Grabau (1809 / 1812–1870), German physician