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Count Rudolph (or Rudolf) of Ponthieu (died 866) was a son ofWelf (also Hwelf or Welf I) byHedwig of Bavaria, and thus a brother ofJudith of Bavaria and wife ofEmperor Louis the Pious. Through Judith's influence, her brother Rudolph acquired and became lay abbot of the abbeys ofSaint Riquier andJumieges.

In April 830, Frankish nobility revolted against Emperor Louis in order to "liberate" him from the influence of his wife Judith. Louis was placed underhouse arrest, whilst Judith and her brothers Rudolph andConrad I, Count of Auxerre, were imprisoned in Aquitanian monasteries. The two brothers were later freed when their nephewCharles the Bald assumed the throne.

Rudolph was married toHruodun (died 867), who bore him:

• Conrad, Count of Paris and Sens (died 882)
• Welf, Abbot of Sainte-Colombe-de-Sens
• Hugh
• Rudolf, Duke of Rhaetia

• The Carolingians, A family who forged Europe by Pierre Riche (translated by Michael Idomir Allen), University of Philadelphia Press, 1993
• I Conti de' Marsi e la loro discendenze fino alla fondazione dell'Aquila by Cesare Rivera, Teramo, 1915

• 866 deaths
• Carolingian dynasty
• 9th-century people from East Francia
• Forcibly monasticised

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• Year of birth unknown