Jahnke

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