Francisca de Jong was the widow of Joël Godefroi. They had another son Michel Jules.
Stadsarchief Amsterdam, archiefkaart Michel Jules Godefroi
In addition, Jokos files (numbers 15072, 15074) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.