Barend Bonewit was a son of Levie Bonewit and Sophia Roe. He married Leentje van der Sluis in Amsterdam on 13 July 1927, a daughter of Joseph van der Sluis and Esther Spaanbroek. Together with Leentje he had three children: Joseph, Sophia and Elsje
City Archive of Amsterdam, archive card of Barend Bonewit and website www.wiewaswie.nl.