Jannasch

Jannasch is a German surname. Notable people with this surname include the following:
 * Holger W. Jannasch (1927-1998), German microbiologist for whom the genus Jannaschia was named
 * Lilli Jannasch (1872–1968), German feminist, pacifist, journalist and graphologist
 * Marie Jannasch (1824–1877), German nurse
 * Niels Jannasch (1924–2001), German-Canadian mariner and marine historian
 * Wilhelm Jannasch (1888–1966), German Protestant theologian and clergyman