These persons are listed as residing at the same address. The source does not provide information about how they were related to one another.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a watch shop, address: Nieuwendijk 80 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives
In addition, a Jokos file (number 33747) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
Abraham was the brother of Eliazar Springer (22-3-1888 / 15-4-1940) who lived, with his family, at Nieuwendijk 80 Amsterdam