Jonas de Leeuwe was a son of Hermanus de Leeuwe and Jetje Kalkoene. He was married to Sientje van der Sluijs.
Addition of a visitor of the website
In addition, a Jokos file (number 53200) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.