Parents

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Karl Wilhelm Valentiner post-doc 1905-1906 Universität Heidelberg
Max Wolf post-doc 1905-1906 Universität Heidelberg (Physics Tree)
Johannes Franz Hartmann post-doc 1906-1907 Königliche Sternwarte zu Berlin
Karl Schwarzschild post-doc 1906-1907 Astrophysical Observatory Potsdam (Physics Tree)
 (https://en.wikipedia.org/wiki/George_Van_Biesbroeck)
Georges Lecointe research scientist 1904-1915 Royal Observatory of Belgium

Children

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Yu Che Chang grad student 1929 Chicago
Albert William Recht grad student 1939 Chicago
Otto Struve research scientist 1924-1927 Yerkes Observatory