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Siemowit I of Masovia

Polish duke [1]

Born
1215
Died
23 Jun 1262
Nationality
not recorded
Documented descendants
7786

Titles & positions

    House

    Religion

    not recorded

    Sources

    1. Wikidata Q2701734 (retrieved 1 Nov 2026)
    Siemowit I of Masovia (1215–1262) | GOTHA Directory