Nielsen Hayden genealogy
Ancestors of Elizabeth von Hohenstaufen
1205 - 1235 (~ 30 years)
┌── Frederick II von Hohenstaufen 
(1090 - 4 Apr 1147)(m. 1121) =>
(1090 - 4 Apr 1147)(m. 1121) => ┌── 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)
│ └── 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) =>
│
┌── Philip II, King of Germany (1177 - 21 Jun 1208 Bamberg, Bayern, Germany)(m. 25 May 1197)
(1177 - 21 Jun 1208 Bamberg, Bayern, Germany)(m. 25 May 1197) │ │
│ │ ┌── Renaud III of Burgundy (Abt 1093 - 1148) =>
(Abt 1093 - 1148) => │ └── 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) │ └── Agatha of Lorraine ( - 1147) =>
( - 1147) => │
Elizabeth von Hohenstaufen (Between Mar 1205 and May 1205 - 30 Nov 1235)
│
│ ┌── Andronikos Doukas Angelos (Abt 1122 - Aft 1185) =>
(Abt 1122 - Aft 1185) => │ ┌── Isaac II Angelos, Emperor of Byzantium (Constantinople;Sep 1156 - Jan 1204)
(Constantinople;Sep 1156 - Jan 1204) │ │ └── Euphrosyne Kastamonitissa (Abt 1125 - Aft 1195)
(Abt 1125 - Aft 1195) │ │
└── Irene Angelina (Abt 1181 Constantinople - 27 Aug 1208 Hohenstaufen Castle, Bavaria)(m. 25 May 1197)
(Abt 1181 Constantinople - 27 Aug 1208 Hohenstaufen Castle, Bavaria)(m. 25 May 1197) │
│ ┌── Demetrios Tornikes (Abt 1121 Thebes, Greece - Abt 1201) =>
(Abt 1121 Thebes, Greece - Abt 1201) => └── (First wife of Isaac II Angelos) ( - Bef 1185)
( - Bef 1185)