Regina Gras was a daughter of Joel Gras and Sara Wollman. She married 24 August 1903 in Gulpen to Abraham Wilkens, a son of Isaac Wilkens and Lena Frenk. website www.wiewaswie.nl.
In addition, a Jokos file (number 36306) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.