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Frederick IX

Frederick IX, 1899–1972, king of Denmark (1947–72), son and successor of Christian X. He married (1935) Princess Ingrid of Sweden. Because he did not have a son the constitution was amended in 1953 to allow for a female heir to the throne; Frederick was succeeded by his daughter, Queen Margaret II.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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