Family history
Jan Dirk Thumann
1908 – 1974 (66 years)
Born on 9 March 1908 in Norg, Drenthe, Koninkrijk der Nederlanden.
Died on 9 October 1974 in Amsterdam, Noord-Holland, Koninkrijk der Nederlanden.
Worked as Chemiker later suikertechnoloog in zowel Nederlandsch Oost-Indië als Britsch-Indië.
Was married to Anna Wilhelmina Timman.