Levie de Groot was a son of Zacharias de Groot and Jetje Vleeskruijer. He married Heintje Rootveldt in Amsterdam on 8 November 1933 in Amsterdam, a daughter of Gabriel Rootveldt and Engelina van Bever.
City Archive of Amsterdam, archive card of Levie de Groot and Heintje Rootveldt.
In addition, a Jokos file (number 10055) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.