Isaäc Roodveldt was a son of Mozes Roodveldt and Lena Abraham Waterman. Hhe married in Amsterdam on 28 November 1883 to Sophia Lisser. The couple had 10 children: Kaatje, Mozes, Mietje, Abraham, Esther, Lea, Marcus, Jesaia, Aron and Selina. None of them survived the Holocaust.
City Archive of Amsterdam, archive cards of Isaac Roodveldt and Sophia Lisser.//
Biography