Margaret was a daughter of Siemowit III of Masovia and his wife Euphemia of Opawa. Her paternal grandparents were Trojden I of Masovia and his wife Maria, daughter of Yuri I of Galicia and Euphemia of Kuyavia. Life. In 1369 Margaret married her first husband Casimir IV, Duke of Pomerania, son of Bogislaw V, Duke of Pomerania and Elizabeth of Poland.
Immediate Family: Daughter of Książę Siemowit III "Starszy" Prince of Mazovia and Eufemie Opavská Wife of Casimir IV, Duke of Slupsk and Henry VII with a Scar Mother of Ludwik II brzeski, książę and Margareta Sister of Anna ; Eufemija Siemovitaitė ; Janusz I Starszy ks.
Margaret Piast of Masovia was born before 1358 to Siemowit III of Masovia (c1320-1381) and Euphemia of Troppau (c1320-1352) and died 1392 of unspecified causes. She married Kasimir IV. von Pommern (c1351-1377). She married Henry VII of Brzeg (c1344-1399).
- Euphemia of Troppau (c1320-1352)
- Kasimir IV. von Pommern (c1351-1377)
Cymburgis of Masovia (German: Cimburgis von Masowien), also Zimburgis or Cimburga (Polish: Cymbarka mazowiecka; 1394 or 1397 – 28 September 1429), a member of the Polish Piast dynasty, was Duchess of Austria from 1412 until 1424, by her marriage with the Habsburg duke Ernest the Iron.
Life Born in Innsbruck, Margaret was the eldest daughter of the Inner Austrian duke Ernest the Iron (1377–1424) and his second wife, the Piast princess Cymburgis of Masovia (1394/97–1429). Upon her father's death, she and her siblings were raised under the tutelage of their uncle Duke Frederick IV of Austria.
In September 1364 he participated in a conference in Krakow, which offered five crowned kings, dukes and princes extravagant festivities and tournaments. In 1369 Margaret, the daughter of Siemowit, wife of Casimir IV, Duke of Pomerania, adopted an illegitimate son of Casimir III the Great.
On 25 January 1412, Ernest married his second wife, the Piast princess Cymburgis of Masovia, who was his equal in vitality and with whom he had nine children: Frederick III, Holy Roman Emperor (21 September 1415 – 19 August 1493) Margaret of Austria (1416/17 – 12 February 1486), married on 3 June 1431 to Frederick II, Elector of Saxony
Princess Margaret, British royal, the second daughter of King George VI and Queen Elizabeth and the younger sister of Queen Elizabeth II. She struggled throughout her life to balance an independent spirit and artistic temperament with her duties as a member of Britain’s royal family.
June 24, 1432 Maria married Slovenian prince Boguslav IX, cousin of Denmark, Norway and Sweden, Erickson, who, according to agreements with the states of Sweden and Denmark, had succeeded in these kingdoms.
In 1369 Margaret, the daughter of Siemowit, wife of Casimir IV, Duke of Pomerania, adopted an illegitimate son of Casimir III the Great. At that time, Casimir IV of Słupsk was one of the contenders to succeed Casimir III the Great, who left only daughters.