Background
He was a son of Duke Conrad I of Zähringen and his wife Clementia of Luxembourg-Namur.
He was a son of Duke Conrad I of Zähringen and his wife Clementia of Luxembourg-Namur.
He is first mentioned as the son of Duke Conrad I in a document dated 1146. In 1152, he is named as a younger brother of Duke Berthold IV. In May 1189, he is first mentioned as Duke of Teck (Dux de Tecke) in a document of Emperor Henry VI. A Duke "Adalbert of Teck" is also mentioned on 20 June 1192 in Schwäbisch Gmünd, on 4 (or 10) December 1193 in Gelnhausen and on 12 December 1193 at the court of Henry VI in Frankfurt, in a document of Count Egino IV of Urach about Bebenhausen Abbey, and by Bishop Diethelm of Constance in 1192. He may have already held the office of Treasurer of the Bishopric of Basel.