[1][2][3] Since the days of Emperor Henry IV, her father's ancestors ruled over the Egerland territory in the Bavarian March of the Nordgau, which, however, was seized by King Conrad III of Germany upon the margrave's death in 1146.
[4] To secure his hold on the Egerland, Conrad III married his nephew Frederick of Hohenstaufen to Diepold's daughter, Adelaide, before 2 March 1147 in the city of Eger.
[6][7][8] Adelaide rarely made public appearances and was not present for Frederick's election as the successor of his paternal uncle, Conrad III, on 4 March 1152, nor for his coronation as King of Germany at Aachen Cathedral five days later.
[6] Frederick immediately began to court the Byzantine princess Maria Komnena, though to no avail.
No longer a queen, Adelaide, apparently unhampered by her former husband, soon after entered into a morganatic marriage with Dietho of Ravensburg, a ministerialis in the service of Duke Welf VI.