Michel Joëls was a son of Mozes Joëls and Sophie Levy. He was married to his cousin Elisabeth Joëls who died in a car accident in Belgium in 1938.
Michel Joëls was a member of the city council of The Hague for the Vrijzinnig-Democratische Bond. After the Dutch capitulation in May 1940 he took his own life. He wrote a farewell letter to The Hague mayor De Monchy from which the following quotation:
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