Roosje Sluijzer was a daughter of Levie Sluijzer and Dina Grijsaard. She married Samuel Appelboom in Amsterdam on 26 November 1908, a son of Salomon Appelboom and Matje Pimentel. The couple had six children: Salomon, Levie, Mozes, Abraham, Mathilda and Dina. One son has survived the Holocaust but the other five children have been killed in the Shoah. Samuel Appelboom deceased already on 11 March 1935 and has been interred one day later in the Jewish Cemetery in Diemen.
City Archive of Amsterdam, family registration card of Levie Sluijzer, Municipal Archive of Den Haag; family registration cards of Roosje Sluijzer and Samuel Appelboom; website Akevoth/Mokum/Burial Permits; website www.wiewaswie.nl and an addition of a visitor of the website.