Frederik I may refer to:
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Frederick I of Denmark (1471–1533)
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Frederick I of Sweden
Frederick I ( sv, Fredrik I; 28 April 1676 – 5 April 1751) was prince consort of Sweden from 1718 to 1720, and King of Sweden from 1720 until his death and (as ''Frederick I'') also Landgrave of Hesse-Kassel from 1730. He ascended the throne f ...
(1676–1751)
See also
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Frederick I (disambiguation)
{{hndis, Frederik I