Nielsen Hayden genealogy
Descendants of Richiza of Denmark
![Female](img/tng_female.gif)
Father: Valdemar I den Store, King of Denmark
(14 Jan 1131 - 12 May 1182 Vordingborg, Denmark)
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Mother: Sofie of Polotsk
(Abt 1141 - 5 May 1198)
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Richiza of Denmark ( - 8 May 1220 bur.Ringsted, Zealand, Denmark)
       │    └─ Richza of Werle
( - Aft 2 Oct 1312 bur.Göttingen, Lower Saxony, Germany) =>
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       │     + Albrecht II of Brunswick
(Abt 1268 -
       │     22 Sep 1318 bur.Brunswick Cathedral, Braunschweig, Lower Saxony, Germany)(m. 10 Jan 1284)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
       │     22 Sep 1318 bur.Brunswick Cathedral, Braunschweig, Lower Saxony, Germany)(m. 10 Jan 1284)
       │
Sofia of Denmark, Queen Consort of Sweden
(Abt 1241 - 1286)(m. 1260)
![Collapse](img/tng_minus.gif)
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       │     + Gerhard II of Holstein
(Bef 1 Nov 1253 - 25 Oct 1312 bur.Hamburg Cathedral, Hamburg, Germany)
       │     (m. 12 Dec 1275 Lödöse, Sweden)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
       │     (m. 12 Dec 1275 Lödöse, Sweden)
       
Siegfried I of Anhalt
(Abt 1230 - Aft 25 Mar 1298)(m. Bef 17 Oct 1259)
![Collapse](img/tng_minus.gif)
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           └─ Albrecht I of Anhalt
( - Between 17 Aug 1316 and 2 Mar 1317) =>
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)
            + Agnes of Brandenburg
( - 4 Jun 1330 bur.St. Nikolai, Zerbst, Saxony-Anhalt, Germany)(m. 1300)
![Locate Person in Chart, Link to Ancestor Chart & Descendant Chart](img/rrtextplus_locate.gif)