Lion van Praag, son of Naphtali van Praag and Rachel Vleeschdrager, married 15 February 1933 in Amsterdam Elisabeth Roodveldt, a daughter of Gompel Roodveldt and Clara Groen. The couple had two children: their daughter Elly has been killed in the Shoah but their son, born in 1942, has survived the Holocaust.
City archive of Amsterdam, archive card of Lion van Praag, Gerrit van Praag and Elisabeth Roodveldt.