Executed people from Greater Poland Voivodeship

Brigadier General Mieczysław Makary Smorawiński (1893–1940), was a Polish military commander and officer of the Polish Army. He was one of the Polish generals identified by forensic scientists of the Katyn Commission as the victim of the Soviet Katyn massacre of 1940.
Mieczysław Makary Smorawiński was born December 25, 1893, in Kalisz, then in Russian Empire. There he graduated from a local primary school and then a Russian language trade school. Early in his youth he joined the Zarzewie resistance organization and became one of its leaders in Kalisz. Denunciated, in 1911 he was arrested and sentenced to 6 months in prison in Ekaterinoslav (modern Dnipropetrovsk in Ukraine). After finishing his term he emigrated to Lwów (modern Lviv) in Austro-Hungarian Galicia, where in 1912 he passed his matura exam and joined the Faculty of Chemistry of the Lwów School of Technology. There he also joined the Drużyny Strzeleckie organization, in which he received basic military training.

Seweryn Antonowicz Kłosowski (14 December 1865 – 7 April 1903), better known under his pseudonym George Chapman, was a Victorian era Polish serial killer known as the Borough Poisoner.
Born in Congress Poland, Chapman moved to England as an adult, where he committed his crimes. He was convicted and executed after poisoning three women, but is remembered today mostly because some contemporary police officers suspected him of being the notorious serial killer "Jack the Ripper".