John, Duke of Östergötland

Swedish prince

Source-basedFalling

Lived 1589–1618, aged 29Sweden

Summary

Updated 2026-07-21

John of Sweden, Duke of Östergötland was a Swedish royal dynast. He was titular Duke of Finland 1590–1606 and reigning Duke of Östergötland 1606–18.

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Falling

48.0

Composite of search demand, mentions, audience & graph footprint.

Score components

Historical13.1

Source confidence60.0

Completeness50.0

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