Jukka Rahja

Jukka Rahja (1887, Kronstadt – August 31, 1920, Petrograd) was a Russian-Finnish bolshevik who joined the Russian Social Democratic Labour Party in 1903. He was also active in the Finnish labour youth movement. Rahja fled to the Russian SFSR after the Finnish Civil War and became a founding member of the Finnish Communist Party (SKP). Rahja was murdered in Petrograd by the opposition communists led by Aku Paasi in 1920. The so-called "murder opposition" consisted mainly of students of the Petrograd Red Officer School.

Jukka was the brother of Eino Rahja and Jaakko Rahja. The word "Rahjaism" was used to describe the politics of the brothers, who were usually in conflict with their comrades and attracted many enemies. The Rahjas were involved in smuggling, blackmarketing, horse-trading and fabrication of money, for example, and they were accused of corruption, extravagant life and drunkenness in the SKP.