Isaäc Vleeskruijer was a son of Leendert Wolf Vleeskruijer and Judic Klerk. He married in Weesp on 29 June 1893 to Sipora Premseler.
Isaäc Vleeskruijer died 25 Juli 1942 and was buried on 28 July 1942 at the Jewish Cemetery of Muiderberg.
City Archive of Amsterdam, archive card of Isaac Vleeskruijer.