Köhn was born to a German father and Norwegian mother and immigrated to Norway in 1946.

[1] She graduated from the University of Oslo with a degree in theology (candidata theologiæ) in 1966.

Köhn worked as an assistant professor in Biblical Theology at the University of Oslo from 1976 to 1989, and principal of the Practical-Theological Seminary from 1989 to 1993.

In 2004, in recognition of her work for the church, she was appointed a Commander of the Royal Norwegian Order of St. Olav by King Harald V. Köhn was married to Susanne Sønderbo.

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