Jahnke is a German surname meaning "kin of John" or "kin of Johann". The name likely originated in northeast Germany, possibly Pomerania. Notable people with the surname include:
- Eugene (Eugen) Jahnke (1863-1921), mathematician, author "Tables of functions with formulae and curves" with Fritz Emde
- Gerburg Jahnke (born 1955), German comedian
- Hugo Jahnke (1886–1939), Swedish gymnast
- Kurt Jahnke (1882–1945), German-American intelligence agent and saboteur
- Eric Jahnke (born 1972), American author, former editor of Beckett Basketball magazine
- Ryan Jahnke (born 1978), American figure skater
- Corey Jahnke (born 1966), American pharmacist, and self help author
See also
edit- Jahnke, Richmond, Virginia, a neighborhood in Richmond, Virginia, United States