Nielsen Hayden genealogy
Ancestors of Valdemar I den Store, King of Denmark
1131 - 1182 (51 years)
┌── Thorkill Sprakalaeg 
( - Abt 1009)
( - Abt 1009) ┌── Ulf Thorgilsson ( - 25 Dec 1026 Trinity Church, Roskilde, Zealand, Denmark)
( - 25 Dec 1026 Trinity Church, Roskilde, Zealand, Denmark) ┌── Swein II Estridsson, King of Denmark (Abt 1026 England -
│ Apr 1074 Søderup, near Åbenrå, Sonderjylland, Denmark)
(Abt 1026 England -│ Apr 1074 Søderup, near Åbenrå, Sonderjylland, Denmark)
│ │ ┌── Swein Forkbeard, King of England and Denmark (Abt 960 - 3 Feb 1014 Gainsborough,
│ │ │ Lincolnshire, England) =>
(Abt 960 - 3 Feb 1014 Gainsborough, │ │ │ Lincolnshire, England) =>
│ └── Estrid, Queen of Denmark (Abt 990 - Between 1057 and 1073)
(Abt 990 - Between 1057 and 1073) │
┌── Erik I, King of Denmark (Abt 1060 Slangerup, North Zealand, Denmark - 10 Jul 1103 Paphos, Cyprus)
(Abt 1060 Slangerup, North Zealand, Denmark - 10 Jul 1103 Paphos, Cyprus) │ (m. Bef 1086)
┌── St. Canute Lavard (1096 Roskilde, Zealand, Denmark -
│ 7 Jan 1131 Haraldsted forest, near Ringsted, Zealand, Denmark)(m. Abt 1116)
(1096 Roskilde, Zealand, Denmark -│ 7 Jan 1131 Haraldsted forest, near Ringsted, Zealand, Denmark)(m. Abt 1116)
│ │
│ │ ┌── Ulf
│ │ ┌── Thrugot Ulfsen
│ │ │ │
│ │ │ │ ┌── Haakon Ericsson (Abt 998 - Abt 1030)(m. Abt 1029) =>
(Abt 998 - Abt 1030)(m. Abt 1029) => │ │ │ └── Bodil Hakonsdatter
│ │ │ └── Gunhild Burislawsdatter (m. Abt 1029) =>
(m. Abt 1029) => │ │ │
│ └── Boedil Thorgunnasdotter (Abt 1062 - 1103 near Jerusalem)(m. Bef 1086)
(Abt 1062 - 1103 near Jerusalem)(m. Bef 1086) │ │
│ │ ┌── Vagn Agesen
│ └── Thorgunna Vagnsdatter
│ └── Ingeborg Thorkilsdatter
│
Valdemar I den Store, King of Denmark (14 Jan 1131 - 12 May 1182 Vordingborg, Denmark)
│
│ ┌── Yaroslav I "The Wise", Grand Prince of Kiev ( - 19 Feb 1054 Vyshgorod, a citadel
│ │ north of Kiev) =>
( - 19 Feb 1054 Vyshgorod, a citadel │ │ north of Kiev) =>
│ ┌── Vsevolod I Monomakh, Grand Prince of Kiev (1030 - 13 Apr 1093)
(1030 - 13 Apr 1093) │ │ └── Ingegerd (St. Anna) of Sweden ( - 10 Feb 1050) =>
( - 10 Feb 1050) => │ │
│ ┌── Vladimir II Monomakh, Grand Prince of Kiev (1053 - 19 May 1125)
(1053 - 19 May 1125) │ │ │
│ │ │ ┌── Constantine Monomachos, Emperor of Byzantium (Abt 1000 Constantinople -
│ │ │ │ 11 Jan 1055 Monastery of Mangana, Constantinople) =>
(Abt 1000 Constantinople -│ │ │ │ 11 Jan 1055 Monastery of Mangana, Constantinople) =>
│ │ └── Maria Monomacha ( - 1067)
( - 1067) │ │
│ ┌── Mstislav I, Grand Prince of Kiev (1076 - 15 Apr 1132)(m. 1095)
(1076 - 15 Apr 1132)(m. 1095) │ │ │
│ │ │ ┌── Harold II Godwinson, King of England (Abt 1022 - 14 Oct 1066 Hastings, Sussex, England)
(Abt 1022 - 14 Oct 1066 Hastings, Sussex, England) │ │ │ │ (m. Abt 1064)
│ │ │ │ └── Gytha Thorsgilsdottir (Abt 997 - Abt 1069)(m. Between 1019 and 1020) =>
(Abt 997 - Abt 1069)(m. Between 1019 and 1020) => │ │ │ │
│ │ └── Gytha of Wessex
│ │ │
│ │ │ ┌── Ælfgar of Mercia (Bef 1031 - Abt 1062) =>
(Bef 1031 - Abt 1062) => │ │ └── Ealdgyth of Mercia, Queen Consort of England ( - Aft 1066)(m. Abt 1064)
( - Aft 1066)(m. Abt 1064) │ │ └── Ælfgifu
│ │
└── Ingeborg of Kiev (Abt 1100 - ??)(m. Abt 1116)
(Abt 1100 - ??)(m. Abt 1116) │
│ ┌── Ragvald Ulfsson (Abt 990 - ??) =>
(Abt 990 - ??) => │ ┌── Stenkil Ragnvaldsson, King of Sweden (Abt 1020 - 1066)
(Abt 1020 - 1066) │ │ └── Astrid Njalsdotter
│ │
│ ┌── Inge Stenkilsson, King of Sweden (Abt 1040 - Abt 1100)
(Abt 1040 - Abt 1100) │ │ │
│ │ │ ┌── Emund, King of Sweden =>
=> │ │ └── (Unknown) of Sweden
│ │
└── Christine of Sweden (Abt 1076 - 18 Jan 1122)(m. 1095)
(Abt 1076 - 18 Jan 1122)(m. 1095) └── Helena (Abt 1050 - ??)
(Abt 1050 - ??)