Grotjan
Grotjan is a family name for the following people:
- Hermann Grotjan (1814–1885), German educator
- Johannes Grotjan (architect) (1843–1922), German architect
- Johannes Grotjan (District Administrator) (1897 – after 1951), German administrative lawyer
- see also Genevieve Grotjan Feinstein (1912-2006), née Grotjan, American cryptologist