Eufemia Mazowiecka

'''Eufemia''' – '''księżniczka mazowiecka''', '''księżna cieszyńska''' z dynastii '''Piastów'''. http://pl.wikipedia.org/wiki/Eufemia_mazowiecka_%28ok._1310-po_1373%29 ______________________________________________________________ Info from Wikipedia https://en.wikipedia.org/wiki/Casimir_I,_Duke_of_Cieszyn

Euphemia (b. 1310 – d. aft. 11 January 1374), daughter of Duke Trojden I of Czersk-Warsaw. Married Casimir I of Cieszyn (Polish: Kazimierz I cieszyński, Czech: Kazimír I. Těšínský, German: Kasimir I. von Teschen; 1280/90 – c. 29 September 1358),the Duke of Cieszyn from 1315, Duke of Siewierz from 1337 and Duke of Bytom from 1357. He was the second son of Mieszko I, Duke of Cieszyn by his wife, probably called Grzymisława. They had nine children:

Anna (b. 1325 – d. 1367), married in 1338 to Duke Wenceslaus I of Legnica. Władysław (b. 1325/31 – d. May 1355). Jolanta Helena (b. ca. 1331 – d. 20 March 1403), Abbess of St.Clara in Kraków. Bolesław (b. ca. 1331/32 – d. Prague, 23 July 1356). Przemysław I Noszak (b. 1332/36 – d. 23 May 1410). Agnes (b. 1338 – d. by 27 April 1371), married by 23 February 1354 to Duke Konrad II of Oleśnica. Jan (b. 1339/40 – d. aft. 18 May 1359). Siemowit (b. ca. 1340 – d. 25 September 1391). Elisabeth (b. aft. 1340? – d. aft. 20 January 1364), a nun in Trzebnica. _____________________________________________________________________________