A dental practitioner forced into hiding to escape Nazi persecution, Fritz Pfeffer became an unwitting participant in one of history’s most documented personal narratives. Known to readers worldwide as Alfred Dussel, the German-born surgeon spent his final years in confinement before his life concluded within the brutal medical environment of a Northern German concentration camp.
Early Career and Emigration
Born in 1889 in Giessen, Pfeffer was one of six children in a family that operated a textile business. He pursued advanced clinical training, qualifying as a dentist and jaw surgeon. By 1911, he secured his license to practice. He served in the German military during the First World War. Following his marriage in 1926 to Vera Bythiner and the birth of their son, Werner Peter, Pfeffer eventually faced the intensifying antisemitic climate of the 1930s. In 1938, he sent his son to the United Kingdom for safety. By December of that year, Pfeffer fled Berlin for Amsterdam alongside his partner, Charlotte Kaletta.
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Upon settling in Amsterdam, Pfeffer reestablished his dental practice. Through his professional contacts, he met Miep Gies and became acquainted with Otto Frank. As the Nazi occupation deepened, Pfeffer sought a place of concealment. On 16 November 1942, he moved into the secret rooms housing the Frank and Van Pels families. His presence provided the group with an on-site dentist, though his forced proximity to Anne Frank generated significant interpersonal tension. The generational gap, coupled with differing temperaments and a shared, confined living space, resulted in a difficult relationship characterized by mutual frustration.
Deportation and Death
The period of hiding ended on 4 August 1944, when Pfeffer and the other occupants were discovered and arrested. He was held at the Euterpestraat headquarters before being transferred to the Westerbork transit camp. In September 1944, he was moved to Auschwitz, where he briefly reunited with Otto Frank. His final transfer occurred in October 1944, when he was relocated to the Sachsenhausen camp and subsequently to Neuengamme. Camp records document his death on 20 December 1944, at age 55, citing enterocolitis as the cause.
Posthumous Reception
After the 1947 publication of Anne Frank's diary, Pfeffer’s reputation became a point of contention. His family members, including his son Werner and partner Charlotte—who was legally recognized as his widow in 1950—objected to the unflattering portrayal rendered under the pseudonym Alfred Dussel. They contended that the depiction unfairly disparaged his character, a critique they maintained during the subsequent theatrical and cinematic adaptations of the text.
Fast facts
- Born: 1889, Giessen, Germany
- Died: 20 December 1944, Neuengamme concentration camp
- Nationality: German Reich
- Occupation: Dentist and jaw surgeon
- Son: Werner Peter Pfeffer
- Partner: Charlotte Kaletta
- Pseudonym: Alfred Dussel
Questions readers ask
Why did Fritz Pfeffer go into hiding?
As a Jewish citizen under the Nazi occupation of the Netherlands, he faced systemic persecution and sought to escape deportation by moving into a secret annex with the Frank and Van Pels families.
How did Pfeffer die?
He died of enterocolitis at the age of 55 in the infirmary of the Neuengamme concentration camp in December 1944.
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