Albert the Bear
The date of the marriage is unknown. According to older historians it was around 1142. Kazimierz Jasiński considered that Bolesław IV and Mieszko III were looking for an ally related to Conrad only from 1146. This ally was mentioned first time in sources in the summer of 1146 when Conrad and Albert the Bear, duke of Saxony, conducted negotiations between the Polish princes. According to Jasiński, Dobroniega married Theodoric probably around 1147 (between 1146 and 1148). This date is accepted by other historians. On 6 January 1148 Judyta, sister of Dobroniega, married to Otto, son of Albert the Bear.