Category:Welf IV

**Welf I**
	Duke of Bavaria
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Name in native language	Welf IV;
Date of birth	c. 1035 (statement with Gregorian date earlier than 1584)
Date of death	6 November 1101; Paphos
Place of burial	Weingarten;
Country of citizenship	Duchy of Bavaria;
Occupation	sovereign;
Noble title	duke of Bavaria (Henry IV, Otto of Nordheim, 1070–1077); duke of Bavaria (Welf II, Duke of Bavaria, Henry IV, 1096–1101);
Family	House of Welf; House of Este;
Father	Albert Azzo II, Margrave of Milan;
Mother	Kunigunde of Altdorf;
Sibling	Fulco I, Margrave of Milan; Hugh V, Count of Maine;
Child	Welf II, Duke of Bavaria; Henry IX, Duke of Bavaria; Adelheid of Bavaria;
Spouse	Judith of Flanders, Countess of Northumbria (1071–); Ethelinde of Northeim;
Authority file
	Q550343; ISNI: 0000000020983818; VIAF ID: 33085650; GND ID: 129754129; Library of Congress authority ID: nr2005010908
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