Pepin was the first count of Vermandois, lord of Senlis

Senlis, Oise

Senlis is a French commune located in the Oise department near Paris. It has a long and rich heritage, having traversed centuries of history. This medieval town has welcomed some of the most renowned figures in French history, including Hugh Capet, Louis IX, the Marshall of France, Anne of Kiev and...

, Péronne

Péronne, Somme

Péronne is a commune of the Somme department in Picardie in northern France.It is close to where the Battles of the Somme took place during World War I...

, and Saint Quentin

Saint-Quentin, Aisne

Saint-Quentin is a commune in the Aisne department in Picardy in northern France. It has been identified as the Augusta Veromanduorum of antiquity. It is named after Saint Quentin, who is said to have been martyred here in the 3rd century....

. He was the son of King Bernard of Italy

Bernard of Italy

Bernard was the King of the Lombards from 810 to 818. He plotted against his uncle, Emperor Louis the Pious, when the latter's Ordinatio Imperii made Bernard a vassal of his cousin Lothair...

 and Cunigunda.

Pepin first appears in 834 as a count to the north of the Seine

Seine

The Seine is a -long river and an important commercial waterway within the Paris Basin in the north of France. It rises at Saint-Seine near Dijon in northeastern France in the Langres plateau, flowing through Paris and into the English Channel at Le Havre . It is navigable by ocean-going vessels...

 and then appears as same again in 840. In that year, he supported Lothair I

Lothair I

Lothair I or Lothar I was the Emperor of the Romans , co-ruling with his father until 840, and the King of Bavaria , Italy and Middle Francia...

 against Louis the Pious

Louis the Pious

Louis the Pious , also called the Fair, and the Debonaire, was the King of Aquitaine from 781. He was also King of the Franks and co-Emperor with his father, Charlemagne, from 813...

.

Pepin's wife is unknown, but has been recorded as Rothaide de Bobbio. His heir inherited much Nibelungid territory and so historian K. F. Werner hypothesised a marriage to a daughter of Theodoric Nibelung. Their children were:

• Bernard (c. 844-after 893), count of Laon
• Gerberge (born c. 854), who married Diedrich De Gaud
• Pepin (c. 846-893), count of Senlis
  Senlis, Oise
  Senlis is a French commune located in the Oise department near Paris. It has a long and rich heritage, having traversed centuries of history. This medieval town has welcomed some of the most renowned figures in French history, including Hugh Capet, Louis IX, the Marshall of France, Anne of Kiev and...
  
   and lord of Valois (877-893)
• Herbert I of Vermandois (c. 850-907)
• Beatrix (born c. 854)
• Maud (born c. 857), who married Malahule Ragnaldsson of More
• Adelaide (born c. 858)
• Cunigunda