Descendancy for Frédéric I: NH genealogy

Nielsen Hayden genealogy

Abt 1143 - 1207 (~ 64 years)

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1 Frédéric I ^[1] b. Abt 1143 d. 1207
- Ludmilla of Poland b. Abt 1150 d. 1223
  - 2 Frédéric II ^[1.1] b. Abt 1172 d. 10 Oct 1213
    - Agnes de Bar b. Abt 1177 d. 21 Jun 1226
      - 3 Alix de Lorraine ^[1.1.1] d. Bef 29 Sep 1242
        
        Wernher I d. 1228
        
        4 Udalhardis von Kyburg ^[1.1.1.1] [ =>]
        
        4 Hartmann V von Kyburg ^[1.1.1.2] d. 3 Sep 1263 [ =>]
      - 3 Mathieu II ^[1.1.2] b. Abt 1193 d. 9 Feb 1251
        
        Katharina von Limburg b. Abt 1215 d. 1255
        
        4 Frédéric III ^[1.1.2.1] b. 1238 d. 31 Dec 1303 [ =>]