Hans-Thorald Michaelis (born 24 April 1925 in Hanover, died 18 December 2004 in Aachen) was a German historian, germanist and genealogist.
After his studies in history, germanistics, philosophy and Protestant religion in Frankfurt am Main, Mainz, Göttingen and Marburg he started a career as a grammar school teacher.
In these politically turbulent times he very early campaigned for this new German “second-chance or adult education” and for the democratisation in school and along with this the student council.
In 1976 he joined the club: “Brüderlicher Kreis” (brother circle), a Christian religious open community with Protestant imprint, which has its origin in the confraternity of Baltic States, founded 1926.
On the basis of already available information and documents regarding several branches of his family he travelled to different regions of Germany and overseas in order to complete these data.