Born: February 25, 1882, Hämeenkoski, Finland.
Died: October 6, 1946.
Buried: Hietaniemi Cemetery, Helsinki, Finland.
Tamminen was the son of school teacher Emanuel Ekqvist Tamminen and Serafia Salin, and husband of Selma Johanna Paunu Dufva.
Ordained a priest in 1905, he worked for the Finnish Lutheran Evangelical Association as a preacher (1908–16), and as executive director (1923–46).
He was a chaplain in Lohja, Finland (1916–24), and made a mission inspection trip to Japan (1925–26). He was a member of the church council in 1933, 1935 and 1938 and member of the hymn book committee appointed by the church council of 1928.
He was a journalist from 1912, and wrote several hymns and songs, and published sermon collections.
He received the title of Rovasti (Dean) in 1932.
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