Vrouwtje Ketellapper was a daughter of Marcus Ketellapper and Rachel Bonewit. She married 6 August 1919 in Amsterdam to Isaac van Loon, a son of Salomon van Loon and Marianna Bonewit. The couple had three children.
Vrouwtje was born in a family with ten children. Two of her sisters have passed away …
In addition, a Jokos file (number 50593) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.