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Male Guelph IV Duke of BAVARIA Click to view Guelph IV Duke of BAVARIA in the family tree

Guelph IV Duke of was born about 1040 in Este, Tuscany.  Guelph IV Duke of's father was Azo II Marquis D' ESTE and his mother was Cunigonde Princess of BAVARIA.  His paternal grandparents were Azo I Marquis  D' ESTE and Valdrada of VENICE; his maternal grandparents were Guelph II Duke of BAVARIA and Irmtrud Countess of LUXEMBOURG.  He was an only child.  He died on November 9th, 1091.


Guelph IV Duke of's family with Judith of  NORMANDY

They had a son named Heinrich IX (Welf) Duke of .