Branca van Lochem was the daughter of Jacob van Lochem and Esther Rootveld. In 1924 she married Jacob Raphaël Groen.
Branca Groen-van Lochem died in Amsterdam in 1942.
Stadsarchief Amsterdam, Archiefkaart van Branca van Lochem
In addition, a Jokos file (number 52663) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.