Leentje van Vlies was a daughter of Benjamin Aron van Vlies and Sara de Jong. She married Salomon den Arend on 14 April 1892 in Rotterdam, a son of Elias den Arend and Rebekka de Korte. However, her husband Salomon den Arend passed away already on 8 November 1912 in Rotterdam. Leentje and Salomon had elven children together, of whom five have died in infancy and one daughter died unmarried in 1921. Three children have survived the war but her daughters Rebekka and Jetje and their families have been killed in the Shoah. Leentje van Vlies has been killed 14 May 1943 in Sobibor.
City Archive of Rotterdam, Digital Family Tree Rotterdam, family registration card of Salomon den Arend and website www.wiewaswie.nl