Back فلف الأول، دوق بافاريا Arabic فلف الاول دوق بافاريا ARZ Велф IV Bulgarian Güelf I de Baviera Catalan Welf IV. German Γουέλφος Α΄ της Βαυαρίας Greek Güelfo I de Baviera Spanish Welf Ier (duc de Bavière) French ולף הראשון, דוכס בוואריה HE Welf I dari Bayern ID
Welf I | |
|---|---|
| Duke of Bavaria | |
 Welf depicted in the Historia Welforum (1470s) | |
| Born | c. 1035/1040 Unknown, perhaps Solesino |
| Died | 6 November 1101 Paphos, Cyprus, Byzantine Empire |
| Noble family | House of Welf (founder) |
| Spouse(s) | Ethelinde of Northeim Judith of Flanders |
| Issue | Welf II / V the Fat Henry IX the Black Kunizza |
| Father | Albert Azzo II, Margrave of Milan |
| Mother | Kunigunde of Altdorf |
Welf I (c. 1035/1040 – 6 November 1101) was Duke of Bavaria from 1070 to 1077 and from 1096 to his death. He was the first member of the Welf branch of the House of Este. In the genealogy of the Elder House of Welf, he is counted as Welf IV.