Rosette Eisendrath was a daughter of the bookseller Samson Eisendrath and Henriette Wolf. She was born on 24 December 1882 at Oude Zijds Achterburgwal 153 in Amsterdam. At the age of 29, she married the 40-year-old Siegfried Nathan Beer, a son of Nathan Hermanus Beer and Clarisse Beer, on 27 June 1912 in Zaandam. Siegfried was born on 27 February 1872 in Amsterdam and was an office clerk by profession (actually a "bureaulist" which is a counter clerk/ticket seller in a station or theater).
Except in Amsterdam, where he lived with his parents, brothers and sisters among others at Jacob van Campenstraat 63 and Nieuwe Zijds Voorburgwal 206, Siegfried also lived in Weesp and shortly in Nijmegen up from mid-June 1891. Then, between 21 December 1897 and 6 March 1899, he was in training for apprentice male nurse at the Dutch Israëlitic Old Men's and Women's Hospital at Nieuwe Kerkstraat 135 in Amsterdam.
As far as is known, Rosette and Siegfried had one son, named Henri Herman Beer, who was born on 10 March 1915 in Surabaya in the Dutch East Indies. He survived the war and married the non-Jewish Dirkje Dijkhuizen in 1950.
Siegfried Nathan Beer died on 18 April 1922 in Amsterdam and was interred in the Jewish Cemetery in Diemen. His widow, Rosette Eisendrath, who then lived at Albert Cuypstraat 95 1st level, was arrested on 8 June 1942 and sent to Ravensbrück concentrationcamp. She was there until 5 October and was sent then from Ravensbrück to Auschwitz. After arriving there on 8 October 1942, Rosette Beer-Eisendrath was gassed in the gas chambers of Auschwitz Birkenau.
Sources include the City Archive of Amsterdam, birth certificate of Siegfried Nathan Beer/ Warmoesstraat 15/year1872-register 2-folio 72verso; Special Registers/nr.19 Siegfried Nathan Beer/training as apprentice male nurse at the Nederlands Israëlitisch Oude Mannen en Vrouwen ziekenhuis; website stenenarchief.nl/grave Siegfried Nathan Beer/record 41962; website wiewaswie.nl/birth Rosette Eisendrath 1882; the file cabinet of the Jewish Council, registration card of Rosette Beer-Eisendrath mentioning Ravensbrück and Auschwitz and the death certificate no. 570 for Rosette Eisendrath from register A70-96verso, made out in Amsterdam on 4 April 1951.