People from the Province of Posen

Paul Rostock (18 January 1892 – 17 June 1956) was a Nazi physician, official, and university professor. He was chief of the Office for Medical Science and Research (Amtschef der Dienststelle Medizinische Wissenschaft und Forschung) under Third Reich Commissioner and Nazi war criminal Karl Brandt and a full professor, medical doctorate, medical superintendent of the University of Berlin Surgical Clinic.
After the end of World War II, he was tried as a war criminal in the Doctors' Trial for his complicity in medical atrocities performed on concentration camp prisoners.

Walter Rudolf Leistikow (1865–1908) was a German landscape painter, graphic artist, designer and art critic.

Feliks “Papa” Stamm (14 December 1901, Kościan (German: Kosten) German Empire – 2 April 1976, Warsaw) was a prominent Polish boxing coach. He is widely regarded as the father of Polish boxing, and the creator of the so-called Polish school of boxing. To commemorate him, since 1977 annual Feliks Stamm Boxing Tournament takes place in Warsaw. In 1987, the tournament was won by Lennox Lewis.In 1923–1926, he was a boxer at the club Pentatlon in Poznań. He rolled down 13 official fights (11 won, 1 drew, 1 loss) as well as about 30 show fights. In 1926, Stamm became a boxing coach at Warta Poznań, and since 1932, he was a lecturer at Central Institute of Physical Education in Warsaw (today's Academy of Physical Education in Warsaw). In 1936, he became an independent coach of the Polish boxing national team. He had already had some experience with the national team of Poland, as in 1928 Stamm helped foreign coaches to prepare Polish boxers for their first official international match vs. Austria.
As a coach, Stamm participated seven times in the Olympic Games (from 1936 to 1968), and 14 times in European Amateur Boxing Championships. He was a tutor and coach of a number of prominent boxers, Olympic and European champions. Among them are such names, as: Mieczysław Forlański, Szapsel Rotholc, Tadeusz Rogalski, Witold Majchrzycki, Edmund Sobkowiak, Franciszek Szymura, Henryk Chmielewski, Józef Pisarski, Aleksander Polus, Antoni Czortek, Antoni Kolczyński, Aleksy Antkiewicz, Zygmunt Chychła, Zenon Stefaniuk, Leszek Drogosz, Zbigniew Pietrzykowski, Tadeusz Walasek, Kazimierz Paździor, Jerzy Adamski, Józef Grudzień, Jerzy Kulej, Marian Kasprzyk, Jan Szczepański, Jan Sielczak.
In 1945, Stamm moved to Bydgoszcz, where he lived together with his wife and four children. In late 1946 he took the post of coaching manager of Polish Boxing Association, commuting from Bydgoszcz to Poznań. After his death, a street in Fordon, a district of Bydgoszcz, was named after him.

Jan Czochralski ( YAN chokh-RAHL-skee, Polish pronunciation: [ˈjan t͡ʂɔˈxralskʲi]; 23 October 1885 – 22 April 1953) was a Polish chemist who invented the Czochralski method, which is used for growing single crystals and in the production of semiconductor wafers. It is still used in over 90 percent of all electronics in the world that use semiconductors. He is the most cited Polish scholar.There is evidence that Czochralski sheltered two Jewish women in his home until the Warsaw Uprising to save them from the Germans and some evidence that he was instrumental in financially helping a previously owned Jewish business in the ghetto.