Born ‎9-12-1873 Kampen-Overijssel, Netherland, died ‎7-12-1942 Auschwitz-Katowice, Poland‎, 68 or 69 years. Son of Nathan Kalf and Keetje Meijer‏

Born ‎25-4-1885 Zutphen, Netherland, died ‎7-12-1942 Auschwitz-Katowice, Poland‎, 56 or 57 years