Julius de Vries was the widower of Elisabeth Stodel who had died on 11 May 1939 in Amsterdam.
Sterf-/Begraafregister van de Nederlands-Israëlitische Gemeente Haarlem (uitgave van de Nederlandse Kring voor Joodse Genealogie, 1999), p. 30, 32
The funeral records at the Jewish cemetery in Haarlem reveal that Julius de Vries was buried there.