Jacobus de Rooij was a son of Willem de Rooij and Annetta Wolf.
Stadsarchief Amsterdam, archiefkaart Willem de Rooij
For some time Jacobus de Rooij and his family lived in the Dutch East-Indies, presumably not far from Tjilatjap. Around 1927 the family returned to the Netherlands and lived in Amsterdam. Although they lived in Amsterdam, Jacobus de Rooij promoted on his thesis in Utrecht.
Addition of a visitor of the website