Samuel Winkel was a son of Joseph Winkel and Sara Poons. He married in Den Haag on 19 August 1925 to Betje Fresco. Municipal Archive of Den Haag, family registration cards of Joseph Winkel and Samuel Winkel.
In addition, a Jokos file (number 32168) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.