Eufemia or Ofka, Princess of Beuthen - Pedigree | FamilyCentral
 Abt 1351 - 26 Aug 1411
 1313 - Bef 4 Oct 1355
  - Aft 8 May 1358
 Abt 1278 - Bef 16 Sep 1355
  - Bef 26 Apr 1316