Nielsen Hayden genealogy
Descendants of Henry I of Burgundy
Abt 946 - 1002 (~ 56 years)Father: Hugues "Le Grand" (Abt 895 - 17 Jun 956 Deurdan, Ile-de-France, France)
Mother: Hedwig of Saxony ( - Aft 958)
Henry I of Burgundy (Abt 946 - 15 Oct 1002)
Mahaut de Châlon ( - Bef 1019)(m. 998)
   └─ Aremburge de Vergy
    Dalmas I of Semur ( - 1048)(m. Abt 1013)
       └─ Helie of Semur (Abt 1015 -
        Aft 1055 Priory of the Holy Trinity of Marcigny-lès-Nonnains, Burgundy, France)
        Aft 1055 Priory of the Holy Trinity of Marcigny-lès-Nonnains, Burgundy, France)
        Robert I (Abt 1011 - 21 Mar 1075)(m. Abt 1033)
           │ + (Unknown wife of Henry I of Burgundy) ( - Aft 5 Jul 1074 bur.Besançon, France)
           └─ Constance of Burgundy (1046 - 1092 bur.Royal Monastery of San Benito, Sahagun, León, Spain) =>
            + Alfonso VI, King of Leon, Castile, and Galicia (Abt 1039 -
            1 Jul 1109 Toledo, Toledo, Castilla-La Mancha, Spain)(m. 1079)
            1 Jul 1109 Toledo, Toledo, Castilla-La Mancha, Spain)(m. 1079)