Maria was the daughter of Moses Wolff and Saartje Mol. With Mordechai Lobo she had two daughters, Engelina Maria, who survived the War, and Saskia Sarah who died in 1931 aged 32.
In addition, a Jokos file (number 50347) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.