Isääc de Swarte was a son of Hijman de Swarte's first marriage to Louise van Dal. Hijman and Louise were married in Amsterdam on 25 November 1908 and on 14 August 1910, Isääc was born as the 2nd child out of this marriage. However, his parents divorced and the marriage was dissolved on 30 May 1930 and no more children were born from that wedlock.
Isääc was a merchant by trade. He traded in art. An…