Frederick IV, Duke of Swabia
Member of the Hohenstaufen ‧ Conrad III of Germany's son
Frederick IV of Hohenstaufen was duke of Swabia, succeeding his cousin, Frederick Barbarossa, Holy Roman Emperor, in 1152.
He was the son of Conrad III of Germany and his second wife Gertrude von Sulzbach and thus the direct heir of the crown, had... Wikipedia
Born: 1145
Died: August 19, 1167 (age 22 years), Rome, Italy
Spouse: Gertrude of Bavaria (m. 1166–1167)
Grandparents: Frederick I, Duke of Swabia, Agnes of Waiblingen, Berengar II of Sulzbach, and more
Great-grandparents: Henry IV, Frederick of Büren, Hildegard von Egisheim, and more
Uncle: Otto of Freising
Parents: Conrad III of Germany and Gertrude of Sulzbach