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Son of Nikolai "Klaas" J. Siemens and Maria Wall Siemens Husband of Agathe Siemens Brother of 71037 Johann Nicolai Siemens; 508450 Nicolai K. Siemens and Private Half brother of Isaac J. Wall; 508455 Peter Wall; 508454 Jakob Wall; 508453 Gerhard Wall and Maria Wall