Sweyn III Grathe was the king of Denmark between 1146 and 1157, in shifting alliances with Canute V and his own cousin Valdemar I. In 1157, the three agreed to a tripartition of Denmark. Wikipedia
Born: 1125
Died: October 23, 1157 (age 32 years), Viborg, Denmark
Grandchild: Poppo van Andechs-Meranië
Parents: Eric II of Denmark and Thunna
Spouse: Adela of Meissen (m. 1152)