Arnold Bueno de Mesquita, son of Mozes (Dick) Bueno de Mesquita (Lochem, 21 maart 1874), owner a furniture store, and Esther Pimentel (Amsterdam, 28 december 1880), had a brother Izaak (Amsterdam, 5 januari 1916), journalist, was killed in Sobibor on 28 May 1943. His younger sister Mathilda (Amsterdam, 16 augustus 1917) was also a journalist. .
Arnold Bueno de Mesquita married twice. His first wife, from 12 June 1940 till 1947, was nurse Tertia (Ter) Kolthoff (Amsterdam, 5 januari 1913 – Amsterdam, 9 juni 1990). His second wife, from 1954, was Hanna Beata (Hansje) van Wijk. Arnold had three sons and two daughters.
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