Nielsen Hayden genealogy
Family: Casimir I, Duke Of Poland / Maria Dobronega (F2431)
m. 1038-
Male
Casimir I, Duke Of Poland
Birth 25 Jul 1016 Krakow, Malowpolskie, Poland 
Death 28 Nov 1058 Poznan, Wielkopolskie, Poland Burial Marriage 1038 [1] Father Mieszko II Lambert, King Of Poland | F2489 Group Sheet Mother Richeza of Lotharingia | F2489 Group Sheet
Female
Maria Dobronega
Birth Aft 1011 Death 1087 Burial Father St. Vladimir of Kiev, Grand Prince of Kiev | F2886 Group Sheet Mother (Unknown mistress of St. Vladimir of Kiev) | F2886 Group Sheet
Male
+ Wladyslaw I Herman, Duke of Poland
Birth Abt 1043 Death 4 Jun 1102 Plock, Mazowieckie, Poland Burial Spouse Judith Premyslid, Princess of Bohemia | F968 Marriage Abt 1080
Female
+ Swatislawa of Poland
Birth Abt 1048 Death 1 Sep 1126 Burial Spouse Vratislaus II, King of Bohemia | F14928 Marriage 1063
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Sources - [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.
- [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.