Bernard de la Bella died in Camp Westerbork on 5 November 1942 at age 45. On 8 November 1942 he was buried at the Jewish cemetery in Assen.
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 Bernard de la Bella 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.