Nielsen Hayden genealogy
Ancestors of Przemysl Ottokar I, King of Bohemia
Abt 1155 - 1230 (~ 75 years)
┌── Oldrich of Bohemia 
(Abt 970 - 9 Nov 1034) =>
(Abt 970 - 9 Nov 1034) => ┌── Bretislaus I (Between 1002 and 1005 - 10 Jan 1055)(m. Aft 1021)
(Between 1002 and 1005 - 10 Jan 1055)(m. Aft 1021) │
┌── Vratislaus II, King of Bohemia (Abt 1035 - 14 Jan 1092)(m. 1063)
(Abt 1035 - 14 Jan 1092)(m. 1063) │ │
│ │ ┌── Henry of Schweinfurt (Abt 971 - 18 Sep 1017) =>
(Abt 971 - 18 Sep 1017) => │ └── Judith of Schweinfurt ( - 2 Aug 1058 bur.St. Vitus Cathedral, Prague, Bohemia)
( - 2 Aug 1058 bur.St. Vitus Cathedral, Prague, Bohemia) │ (m. Aft 1021)
│ └── Gerberge (Abt 970 - Aft 1036)
(Abt 970 - Aft 1036) │
┌── Wladislaw I (Abt 1070 - 12 Apr 1125)
(Abt 1070 - 12 Apr 1125) │ │
│ │ ┌── Mieszko II Lambert, King Of Poland ( - May 1034)(m. 1013) =>
( - May 1034)(m. 1013) => │ │ ┌── Casimir I, Duke Of Poland (25 Jul 1016 Krakow, Malowpolskie, Poland -
│ │ │ 28 Nov 1058 Poznan, Wielkopolskie, Poland)(m. 1038)
(25 Jul 1016 Krakow, Malowpolskie, Poland -│ │ │ 28 Nov 1058 Poznan, Wielkopolskie, Poland)(m. 1038)
│ │ │ └── Richeza of Lotharingia (Abt 998 - 21 Mar 1063 Saalfield, Thuringia, Germany)
(Abt 998 - 21 Mar 1063 Saalfield, Thuringia, Germany) │ │ │ (m. 1013) =>
│ │ │
│ └── Swatislawa of Poland (Abt 1048 - 1 Sep 1126)(m. 1063)
(Abt 1048 - 1 Sep 1126)(m. 1063) │ │
│ │ ┌── St. Vladimir of Kiev, Grand Prince of Kiev ( - 15 Jul 1015 Berestovo, west
│ │ │ of Kiev) =>
( - 15 Jul 1015 Berestovo, west │ │ │ of Kiev) =>
│ └── Maria Dobronega (Aft 1011 - 1087)(m. 1038)
(Aft 1011 - 1087)(m. 1038) │
┌── Wladislaw II, King of Bohemia (Abt 1110 - 18 Jan 1175)(m. 1153)
(Abt 1110 - 18 Jan 1175)(m. 1153) │ │
│ │ ┌── Poppo
│ │ ┌── Heinrich I von Berg-Schelklingen ( - Bef 24 Sep 1116)
( - Bef 24 Sep 1116) │ │ │ └── Sophia
│ │ │
│ └── Richza von Berg-Schelklingen (Abt 1095 - 27 Sep 1125)
(Abt 1095 - 27 Sep 1125) │ └── Adelaide von Mochental ( - Abt 1 Dec 1125)
( - Abt 1 Dec 1125) │
Przemysl Ottokar I, King of Bohemia (Abt 1155 - 15 Dec 1230)
│
│ ┌── Ludwig (Abt 1015 - Abt 13 Jun 1080 bur.St. Albans Abbey, Mainz, Hessen, Germany)
(Abt 1015 - Abt 13 Jun 1080 bur.St. Albans Abbey, Mainz, Hessen, Germany) │ ┌── Ludwig of Thuringia (Abt 1042 - Abt 6 May 1123)(m. 5 Feb 1088)
(Abt 1042 - Abt 6 May 1123)(m. 5 Feb 1088) │ │ └── Cacelie von Sangerhausen
│ │
│ ┌── Ludwig I of Thuringia (Abt 1090 - 12 Jan 1140)
(Abt 1090 - 12 Jan 1140) │ │ │
│ │ │ ┌── Lothar-Udo II (Aft 994 - 7 Nov 1057) =>
(Aft 994 - 7 Nov 1057) => │ │ │ ┌── Lothar-Udo III (Between 1020 and 1030 - 4 May 1082)
(Between 1020 and 1030 - 4 May 1082) │ │ │ │ └── Adelheid von Rheinfelden ( - Aft 7 Dec 1057)
( - Aft 7 Dec 1057) │ │ │ │
│ │ └── Adelheid von Stade (Abt 1065 - 18 Oct 1110)(m. 5 Feb 1088)
(Abt 1065 - 18 Oct 1110)(m. 5 Feb 1088) │ │ │
│ │ │ ┌── Hermann III (Abt 1015 - Bef 1050) =>
(Abt 1015 - Bef 1050) => │ │ └── Oda von Werl (Abt 1050 - 13 Jan 1110)
(Abt 1050 - 13 Jan 1110) │ │ └── Richenza ( - Bef 11 Jan 1083)
( - Bef 11 Jan 1083) │ │
└── Jutta of Thuringia (m. 1153)
(m. 1153) │
│ ┌── Giso von Gudensberg
│ ┌── Giso (Abt 1070 - 12 Mar 1122)(m. Between 1096 and 1099)
(Abt 1070 - 12 Mar 1122)(m. Between 1096 and 1099) │ │ └── Mechtild ( - 4 Nov 1110)
( - 4 Nov 1110) │ │
└── Hedwig von Gudensberg ( - 1148)
( - 1148) │
│ ┌── Rugger II
└── Kunigunde von Bilstein ( - Between 1130 and 1138)(m. Between 1096 and 1099)
( - Between 1130 and 1138)(m. Between 1096 and 1099) │
│ ┌── Werner III