Alexander Appelboom died at age 42 in Camp Westerbork on 18 October 1942. He was buried at the Jewish cemetery in Assen on 21 October 1942.
Jewish Historical Museum, Documents collection, inv.nr 3397; Death register of the Jewish community Assen
The funeral records at the Jewish cemetery in Assen reveal that Alexander Appelboom was buried there.
This person is commemorated on a memorial in Assen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.