Jahnke Family History
Jahnke Surname Meaning
North German (also Jähnke): from a pet form of the personal name Jahn ‘John’. Compare Janke.
Germanized form (also Jähnke) of Sorbian Jank, Polish, Czech, and Sorbian Janka.
It is also of Sorbian (and other Slavic) Janko, all cognates of.
Source: Dictionary of American Family Names 2nd edition, 2022
