Robert (Bob) Hanf was a son of Joseph Hanf and Laura Romberg. In 2007 a book was published on his life and work:
W. van der Beek et al., Bob Hanf, 1895-1944 : veelzijdig kunstenaar (Zwolle 2007)
Robert Hanf was the son of Joseph Hanf, who had fled from Germany. He was known as Bob. His father was friends with Breitner, who discovered that Robert Hanf was talented at drawing. He studied chemistry and architecture in Delft. His paintings and drawings were Expressionist. Robert Hanf was also a well-known violinist. Louis Zimmermann was his violin teacher. For several years he was first concert master of the Concertgebouw orchestra. Robert Hanf was unmarried. He lived in Amsterdam.
As a member of the resistance, he helped people in hiding and forged identification cards. On 24 April 1944 he was caught in Amsterdam and imprisoned at the house of detention on the Weteringschans. From there he was deported from Westerbork via the Euterpestraat.
NIOD, Erelijst Verzet en Koopvaardij, database made by J.W. de Leeuw,Nieuw Israëlietisch Weekblad, 21 November 2003
Robert Hanf was a member of artistclub De Kring.
A. Hendriks, In intieme kring. De 85 roemruchte jaren van kunstenaarssocieteit De Kring onthuld (Amsterdam 2007)
See for further information:
P. Micheels e.a., Wat bleef was hun muziek (Den Haag 2007) 22-23; J. van Adrichem (et al.), Rebel, mijn hart : kunstenaars 1940-1945 (Zwolle 1995) 131; R. Fuks-Mansfeld (red.), Joden in Nederland in de twintigste eeuw. Een biografisch woordenboek (Utrecht 2007) 124-125; T. van Helmond, Bob Hanf 1894-1944 (Amsterdam 1982)