In the published version , names were changed : The van Pelses are known as the Van Daans , and Fritz Pfeffer as Albert Dussel .
Mrs. van Pels 's dentist , Fritz Pfeffer , joined them four months later .
In the published version , names were changed : The van Pelses are known as the Van Daans , and Fritz Pfeffer   as Fritz Pfeffer   .
Mrs. van Pels 's dentist , Fritz Pfeffer , joined them four months later .