Raphael Viskoper was a son of Benjamin Viskoper and Anna van Bever. He was unmarried.
Raphael was born in a family with seven children. One sister survived the war, however not her husband Sally Swaab. His other siblings were Betje, Sara, Marianne, Rebecca and Michel. They all have been killed during the Holocaust.
City Archive of Amsterdam, family registration card of Benjamin Viskoper and archive card of Raphael Viskoper.
Biography