Onni Happonen

Onni Happonen (21 May 1898 – 1 September 1930) was a Finnish politician representing the Social Democratic Party of Finland. He was kidnapped and murdered by the fascist Lapua Movement.

Happonen was born in Pölläkkä, Heinävesi, Southern Savonia. He was a construction entrepreneur and the chairman of the Heinävesi municipal council. As a politician, Happonen often argued with local landowners who were supporters or members of the Lapua Movement and the paramilitary right-wing White Guard.

Together with the Ståhlberg kidnapping, the Peasant March and the Mäntsälä rebellion, the Happonen murder is one of the major incidents involving the Lapua Movement.