Eufemia of Mazovia was born 1386 to Siemowit IV of Mazovia (c1353-1426) and Alexandra of Lithuania (c1368-1434) and died 1447 of unspecified causes. Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Rollo of Normandy (860-932)/s.
|Offspring of Eufemia of Mazovia and Bolesław I, Duke of Teschen (c1363-1431)|
|Alexandra of Głogów (c1412-c1464)|
|Wenceslaus I of Głogów, Duke of Teschen (c1415-1474)|
|Władysław of Głogów, Duke of Teschen (1420-1460)||1420||14 February 1460||Margareta of Cilli (c1415-1480)|
|Przemysław II of Głogów, Duke of Teschen (c1423-1477)|
|Bolesław II of Głogów, Duke of Teschen (c1425-1452).|