Background
She was a daughter of Kęstutis, Grand Duke of Lithuania, and his second wife Birutė.
She was a daughter of Kęstutis, Grand Duke of Lithuania, and his second wife Birutė.
Very little reliable information is known about her life. In occasion of her wedding, Danutė received from Janusz I as a dowry the towns of Drohiczyn, Mielnik and Brześć with their surrounding villages. Daughter (Olga?) (1373/76 - ca 8 December 1401), who married firstly in 1388 to Voivode Petru I of Moldavia and secondly with the Moldavian magnate Wilczę.
Janusz the Younger (1376/81 - ca 18 October 1422), who married Katharina of Melsztyn, daughter of Spytek.
Bolesław (1385/86 - ca 4 May 1424), married Anna Feodorovna, granddaughter of Algirdas. Konrad (ca 1400 - 9 December 1412/13).
Danutė died between 17 October 1422 and 20 December 1425, probably on 26 November 1424. She was probably buried at Saint John"s Archcathedral, Warsaw.
The marriage between Danutė and Janusz I was notorious as the longest one among the members of the Piast dynasty.