Jannsen
Jannsen is the family name of the following people:
- Gert Jannsen (* 1939), German geographer, athlete and politician (Greens)
- Harry Jannsen (1851–1913), Estonian journalist and civil servant r
- Johann Voldemar Jannsen (1819–1890), Estonian publicist
- Uwe Jannsen (* 1954), German mathematician
See also: