Jacob van Aals was the son of Salomon van Aals and Marianna Franken.
Hij was married with Lea Blok, who died in 1937.
Addition of a visitor of the website
In addition, a Jokos file (number 12187) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.