Maurits Wolfsbergen, a son of Salomon Wolfsbergen and Rozetta Zangers, married 9 April 1891 in Rotterdam to Clara Frederica Sohn, a daughter of Michael Sohn and Josephine Ochs (or Ochse). The couple had three children, who have survived the war.
Maurits Wolfsbergen had a brother Leonard, who was married in October 1891 to Mathilde Sohn, a sister of his wife.
City Archive of Rotterdam, index births, marriages and deaths and Municipal Archive of Den Haag, Digital Familytree.