Nielsen Hayden genealogy
Ancestors of Friedrich II, Holy Roman Emperor
1194 - 1250 (55 years)
┌── Frederick of Büren 
(Abt 1020 - 1053)(m. Abt 1042) =>
(Abt 1020 - 1053)(m. Abt 1042) => ┌── Frederick I of Swabia (Abt 1050 -
│ Bef 21 Jul 1105 bur.Lorch Abbey, Baden-Württemberg, Germany)(m. Abt 1086)
(Abt 1050 -│ Bef 21 Jul 1105 bur.Lorch Abbey, Baden-Württemberg, Germany)(m. Abt 1086)
│ └── Hildegard of Egisheim-Dagsburg (Abt 1028 - Abt 1095)(m. Abt 1042) =>
(Abt 1028 - Abt 1095)(m. Abt 1042) => │
┌── Frederick II von Hohenstaufen (1090 - 4 Apr 1147)(m. 1121)
(1090 - 4 Apr 1147)(m. 1121) │ │
│ │ ┌── Heinrich IV, Holy Roman Emperor (11 Nov 1050 Goslar, Lower Saxony, Germany -
│ │ │ 7 Aug 1106 Liège, Belgium)(m. 13 Jul 1066) =>
(11 Nov 1050 Goslar, Lower Saxony, Germany -│ │ │ 7 Aug 1106 Liège, Belgium)(m. 13 Jul 1066) =>
│ └── Agnes of Germany (1073 - 24 Sep 1143 bur.Klosterneuberg, Austria)(m. Abt 1086)
(1073 - 24 Sep 1143 bur.Klosterneuberg, Austria)(m. Abt 1086) │ └── Bertha of Turin (1051 - 27 Dec 1087 Mainz, Hessen, Germany)(m. 13 Jul 1066) =>
(1051 - 27 Dec 1087 Mainz, Hessen, Germany)(m. 13 Jul 1066) => │
┌── Frederick Barbarossa, Holy Roman Emperor (1122 - 10 Jun 1190 Saleph River, Cilicia, Anatolia)
(1122 - 10 Jun 1190 Saleph River, Cilicia, Anatolia) │ (m. 9 Jun 1156 Würzburg, Germany)
│ │
│ │ ┌── Welf I of Bavaria ( - 6 Nov 1101 Paphos, Cyprus)(m. 1071) =>
( - 6 Nov 1101 Paphos, Cyprus)(m. 1071) => │ │ ┌── Henry IX of Bavaria (1074 - 13 Dec 1126 Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
(1074 - 13 Dec 1126 Ravensburg, Upper Swabia, Germany)(m. Abt 1100) │ │ │ └── Judith of Flanders (Abt 1033 -
│ │ │ 5 Mar 1094 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. 1071) =>
(Abt 1033 -│ │ │ 5 Mar 1094 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. 1071) =>
│ │ │
│ └── Judith of Bavaria (19 May 1100 - Aft 22 Feb 1130 bur.Waldburg, Heiligen Forst, Alsace)
(19 May 1100 - Aft 22 Feb 1130 bur.Waldburg, Heiligen Forst, Alsace) │ (m. 1121)
│ │
│ │ ┌── Magnus of Saxony (Abt 1045 - 23 Aug 1106 bur.Artlenburg, Lower Saxony)
(Abt 1045 - 23 Aug 1106 bur.Artlenburg, Lower Saxony) │ │ │ (m. Between 1070 and 1071) =>
│ └── Wulfhilde of Saxony (Abt 1075 -
│ 29 Dec 1126 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
(Abt 1075 -│ 29 Dec 1126 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
│ └── Sophia of Hungary (Abt 1050 - 18 Jun 1095)(m. Between 1070 and 1071) =>
(Abt 1050 - 18 Jun 1095)(m. Between 1070 and 1071) => │
┌── Heinrich VI, Holy Roman Emperor (Nov 1165 - 28 Sep 1197 Messina, Sicily)
(Nov 1165 - 28 Sep 1197 Messina, Sicily) │ (m. 27 Jan 1186 Milan, Lombardy, Italy)
│ │
│ │ ┌── William I "The Great" of Burgundy ( - 12 Nov 1087)(m. Between 1049 and 1057) =>
( - 12 Nov 1087)(m. Between 1049 and 1057) => │ │ ┌── Stephen I of Burgundy (1065 - 1102 Anatolia)
(1065 - 1102 Anatolia) │ │ │ └── Stephanie ( - Aft 1092)(m. Between 1049 and 1057)
( - Aft 1092)(m. Between 1049 and 1057) │ │ │
│ │ ┌── Renaud III of Burgundy (Abt 1093 - 1148)
(Abt 1093 - 1148) │ │ │ └── Beatrix
│ │ │
│ └── Beatrice of Burgundy (Abt 1144 - 15 Nov 1184 Jouhe, Jura, France)(m. 9 Jun 1156 Würzburg, Germany)
(Abt 1144 - 15 Nov 1184 Jouhe, Jura, France)(m. 9 Jun 1156 Würzburg, Germany) │ │
│ │ ┌── Thierri II of Lorraine ( - 1115) =>
( - 1115) => │ │ ┌── Simon I of Lorraine (Abt 1076 - 14 Jan 1138)
(Abt 1076 - 14 Jan 1138) │ │ │ └── Hedwig of Formbach ( - Between 1085 and 1090) =>
( - Between 1085 and 1090) => │ │ │
│ └── Agatha of Lorraine ( - 1147)
( - 1147) │ │
│ │ ┌── Henry III of Louvain ( - 1095 Tournai, Hainaut, Belgium)(m. Abt 1090) =>
( - 1095 Tournai, Hainaut, Belgium)(m. Abt 1090) => │ └── Adelaide of Louvain ( - Aft 4 Nov 1158)
( - Aft 4 Nov 1158) │ └── Gertrude of Flanders (Abt 1070 - 1117)(m. Abt 1090) =>
(Abt 1070 - 1117)(m. Abt 1090) => │
Friedrich II, Holy Roman Emperor (26 Dec 1194 - 13 Dec 1250)
│
│ ┌── Tancred of Hauteville (Abt 970 - Abt 1041)
(Abt 970 - Abt 1041) │ ┌── Roger I d'Hauteville (1031 - 22 Jun 1101)(m. 1090)
(1031 - 22 Jun 1101)(m. 1090) │ │ └── Fressenda ( - 1057)
( - 1057) │ │
│ ┌── Roger II, King of Sicily (Between 22 Dec 1095 and 1097 - Between 27 Jan 1154 and 26 Feb 1154)
(Between 22 Dec 1095 and 1097 - Between 27 Jan 1154 and 26 Feb 1154) │ │ (m. 1151)
│ │ │
│ │ │ ┌── Otto of Savona ( - Between Sep 1064 and 12 May 1065)(m. Abt 1036) =>
( - Between Sep 1064 and 12 May 1065)(m. Abt 1036) => │ │ │ ┌── Manfredo de Savona
│ │ │ │ └── Bertha of Turin (m. Abt 1036) =>
(m. Abt 1036) => │ │ │ │
│ │ └── Adelaide de Savona (Abt 1075 - 16 Apr 1118)(m. 1090)
(Abt 1075 - 16 Apr 1118)(m. 1090) │ │
└── Constance of Sicily ( - 27 Nov 1198)(m. 27 Jan 1186 Milan, Lombardy, Italy)
( - 27 Nov 1198)(m. 27 Jan 1186 Milan, Lombardy, Italy) │
│ ┌── Eudes ( - Abt 1158)
( - Abt 1158) │ ┌── Vuiton (Abt 1100 - ??)
(Abt 1100 - ??) │ │ │
│ │ │ ┌── Hugh de Réthel (of Réthel, Ardennes, Champagne-Ardenne, France - 1118) =>
(of Réthel, Ardennes, Champagne-Ardenne, France - 1118) => │ │ └── Mathilde de Réthel
│ │ └── Melisende de Montlhéry =>
=> │ │
└── Beatrice de Vitry-Réthel (Between 1130 and 1135 - 31 Mar 1185)(m. 1151)
(Between 1130 and 1135 - 31 Mar 1185)(m. 1151) │
│ ┌── Albert III of Namur ( - 22 Jun 1102)(m. Abt 1067) =>
( - 22 Jun 1102)(m. Abt 1067) => │ ┌── Godfrey of Namur (Between 1067 and 1068 - 19 Aug 1139 Abbey of Floreffe, Belgium)
(Between 1067 and 1068 - 19 Aug 1139 Abbey of Floreffe, Belgium) │ │ └── Ida ( - 31 Jul 1102)(m. Abt 1067)
( - 31 Jul 1102)(m. Abt 1067) │ │
└── Beatrix of Namur ( - 1160 Rethel, Ardennes, Champagne-Ardenne, France)
( - 1160 Rethel, Ardennes, Champagne-Ardenne, France) │
│ ┌── Conrad I of Luxembourg (Abt 1040 - 8 Aug 1086)(m. Abt 1073) =>
(Abt 1040 - 8 Aug 1086)(m. Abt 1073) => └── Ermisende of Luxembourg (Abt 1080 - 24 Jun 1141)
(Abt 1080 - 24 Jun 1141) └── Clementia of Aquitaine ( - 4 Jan 1142)(m. Abt 1073) =>
( - 4 Jan 1142)(m. Abt 1073) =>