Welf II, Duke of Bavaria

Welf II the Fat (1072–1120), son of Duke Welf I of Bavaria and Judith of Flanders, married the much older Countess Matilda of Tuscany as a teenager in 1088 or 1089, binding his family to the papal side in the Investiture Controversy.

He fought Henry IV in Italy in 1090, then separated from Matilda around 1095 and made peace with the emperor. He succeeded as duke in 1101 and remained married to Matilda until her death in 1115. He died childless at Kaufering on 24 September 1120.