Nielsen Hayden genealogy
Descendants of Friedrich I of Rietberg
Abt 1238 - 1282 (~ 44 years)Father: Konrad I of Rietberg (Abt 1200 - Between 1284 and 1294)
Mother: Oda zur Lippe ( - 17 Sep 1262)
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)
            + Ingeborg of Holstein (Between 1314 and 1317 - Aft 1342)(m. Bef 13 May 1339)