Nielsen Hayden genealogy
Family: Dietrich of Oldenburg / Heilwig of Holstein (F13199)
m. 23 Nov 1423
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Male
Dietrich of Oldenburg
Birth Death 14 Feb 1440 Delmenhorst, Lower Saxony, Germany 
Burial Oldenburg, Lower Saxony, Germany 
Marriage 23 Nov 1423 [1] Father Christian V of Oldenburg | F13200 Group Sheet Mother Agnes of Honstein | F13200 Group Sheet
Female
Heilwig of Holstein
Birth 1398 Death Bef 11 Nov 1436 Burial Oldenburg, Lower Saxony, Germany 
Father Gerhard V of Holstein | F13218 Group Sheet Mother Elisabeth of Brunswick-Lüneburg | F13218 Group Sheet
Male
+ Christian I, King of Denmark, Norway, and Sweden
Birth Feb 1426 Death 21 Mar 1481 Copenhagen, Denmark 
Burial Roskilde Cathedral, Zealand, Denmark 
Spouse Dorothea of Brandenburg | F13198 Marriage 28 Oct 1449 Copenhagen, Denmark 
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Sources - [S1480] The Ancestry of Charles II, King of England: A Medieval Heritage by Charles M. Hansen and Neil D. Thompson. Saline, Michigan: McNaughton and Gunn, 2012.
- [S1480] The Ancestry of Charles II, King of England: A Medieval Heritage by Charles M. Hansen and Neil D. Thompson. Saline, Michigan: McNaughton and Gunn, 2012.