Adelaide of Habsburg
Niece of Emperor Rudolph I
Adelaide of Habsburg (Justina) (died 1313) was niece of emperor Rudolph I of Germany, but her parentage is uncertain.
In 1283 she married Nicholas I, Duke of Troppau. This marriage was consecrated on 8 February 1285. They had three sons:
Nicholas II, Duke of Troppau (1288 – 8 December 1365)
Johann (died 1325).