About Väinö Tanner
Väinö Alfred Tanner (Finnish pronunciation: [ˈʋæi̯nø ˈalfred ˈtɑnːer]; 12 March 1881 – 19 April 1966; surname until 1895 Thomasson) was a leading figure in the Social Democratic Party of Finland, and a pioneer and leader of the cooperative movement in Finland. He was Prime Minister of Finland in 1926–1927. After the Continuation War, and while still in prison, Tanner became the virtual leader of a faction of the SDP which had strong support from the US.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.