Isidorus Schijvenschuurder was born in Antwerp on 2 February 1898 as son of Eva Jacoba Schijvenschuurder and Meijer Samuel van Praag. Isidorus married in Amsterdam Sientje van Praag on 12 February 1919, who was born 3 December 1895 as daughter of the disc sander Israël van Praag and Saartje de Hond. The couple had three children, namely Sara in 1919, Duifje in 1921 and Hartog in 1923. Sientje van …