Jeannette Ketellapper was a daughter of Abraham Ketellapper and Vrouwtje Kloot. She married 30 March 1932 in Amsterdam to Nathan Zwaap, a son of Mozes Zwaap and Rachel Bos.
Jeannette had still another brother Marcus and a sister Rosa.
City Archive of Amsterdam, archive card of Abraham Ketellapper and website www.wiewaswie.nl.