Henri Groen was a son of Moses Groen and Anna Elisabeth Meschendorf. He married in Düsseldorf on 13 April 1913 to Sientje Velleman. The couple had one daughter, who survived the Holocaust.
City Archive of Amsterdam, archive card of Henri Groen.
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a special grocery store, address: Rijnstraat 133 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives