Cornelia van Brakel was the widow of Henry Alberge (10-10-1864 - 20-02-1940). She had a son Levie and a daughter Judic.
Stadsarchief Amsterdam, archiefkaart Levie Alberge
In addition, a Jokos file (number 11018) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.