Coenraad Boeken was a son of Mozes Boeken and Debora Vogel. He married 26 February 1936 in Amsterdam to Rachel Waterman, a daughter of Joseph Waterman and Betje Waterman.
Stadsarchief Amsterdam, archiefkaart Mozes Boeken and Rachel Waterman.
In addition, a Jokos file (number 12877) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.