Nielsen Hayden genealogy
Descendants of Konrad I of Rietberg
Abt 1200 - 1294 (~ 84 years)Father: Heinrich von Arnsberg (Abt 1155 - ??)
Mother: Irmgard
Konrad I of Rietberg (Abt 1200 - Between 1284 and 1294)
Oda zur Lippe ( - 17 Sep 1262)(m. Bef 1237)
   └─ Friedrich I of Rietberg (Abt 1238 - 5 Jul 1282)
    Beatrix von Horstmar ( - 24 Sep 1277)(m. Between 1247 and 1251)
       └─ Hedwig of Rietberg ( - Aft 1347)
        Konrad V of Diepholz (m. Bef 1278)
           └─ Hedwig of Diepholz
            Johann II of Oldenburg (Abt 1270 - Bef 6 Dec 1316)(m. 15 Sep 1298)
               └─ Konrad I of Oldenburg ( - Bef 9 Feb 1348)
                Ingeborg of Holstein (Between 1314 and 1317 - Aft 1342)(m. Bef 13 May 1339)
                   └─ Christian V of Oldenburg ( - Between 10 Nov 1399 and 22 Apr 1403)
                    Agnes of Honstein (Abt 1360 - 1 Sep 1407)(m. Bef 29 Aug 1377)
                       └─ Dietrich of Oldenburg ( - 14 Feb 1440 Delmenhorst, Lower Saxony, Germany)
                        Heilwig of Holstein (1398 - Bef 11 Nov 1436 bur.Oldenburg, Lower Saxony, Germany)
                        (m. 23 Nov 1423)
                        (m. 23 Nov 1423)
                           └─ Christian I, King of Denmark, Norway, and Sweden (Feb 1426 -
                            21 Mar 1481 Copenhagen, Denmark) =>
                            21 Mar 1481 Copenhagen, Denmark) =>
                            + Dorothea of Brandenburg (1430 - 10 Nov 1495 Kalundborg, Denmark)
                            (m. 28 Oct 1449 Copenhagen, Denmark)
                            (m. 28 Oct 1449 Copenhagen, Denmark)