Jacob Koppel was the son of Louis Koppel and Betje Moses. He was married to Betsy van West, daughter of Hijman van West and Eva Menko. The couple had five children.
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Jacob Koppel was married to Betsy van West. On 28 April 1943 their son Salomon was born in Westerbork transit camp.
Record of birth certificates of the Westerbork municipality, currently at the archives of Gemeente Midden-Drenthe in Beilen
In addition, a Jokos file (number 30910) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.