Background
She was the seventh child and only daughter of Albert I, Duke of Brunswick-Lüneburg by his second wife Alessina, daughter of Margrave Boniface II of Montferrat.
She was the seventh child and only daughter of Albert I, Duke of Brunswick-Lüneburg by his second wife Alessina, daughter of Margrave Boniface II of Montferrat.
In March 1291 Matilda married Duke Henry III of GlogóWest Issue
Henry IV the Faithful (b ca 1292 – d 22 January 1342). Konrad I (b ca 1294 – d 22 December 1366).
Bolesław (b ca 1295 – d bef 23 April 1321).
Agnes (b ca 1296 – d 25 December 1361), married firstly on 18 May 1309 to Otto III, Duke of Bavaria and secondly in 1329 to Alram, Count of Hals. Salome (b ca 1297 – d bef 9 December 1309).
January (b ca 1298 – d by 19 May 1365). Katharina (b ca 1300 – d 5 December 1323/26), married firstly bef.
24 March 1317 to John V, Margrave of Brandenburg-Salzwedel and secondly by 27 January 1319 to John III, Count of Holstein-Plön.
Przemko II (b ca 1305 – d 11 January 1331). Hedwig (b ca 1308 – d bef December 1309).