Nielsen Hayden genealogy
Family: Floris I / Gertrude of Saxony (F1448)
m. Abt 1050-
Father | Male
Floris I
Born Abt 1017 Vlaardingen, Zuid-Holland, Netherlands 
Died 28 Jun 1061 Gelderland, Netherlands 
Buried Married Abt 1050 [1, 2] Father Dirk III | F3534 Group Sheet Mother Othelindis of Nordmark | F3534 Group Sheet
Mother | Female
Gertrude of Saxony
Born Abt 1030 Died 4 Aug 1113 Buried Other Spouse Robert I "The Frisian" | F388 Married 1063 Father Bernard II | F1206 Group Sheet Mother Eilika of Schweinfurt | F1206 Group Sheet
Child 1 | Male
+ Dirk V
Born Abt 1053 Died 17 Jan 1091 Buried Spouse Othelhildis | F8696 Married Bef 26 Jul 1083
Child 2 | Female
+ Bertha of Holland, Queen Consort of France
Born Abt 1055 Died 30 Jul 1093 Montreuil-sur-Mer, Pas-de-Calais, France 
Buried Spouse Philippe I, King of France | F2711 Married 1072
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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.
- [S49] Genealogics, by Leo Van de Pas.
- [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.