The Pippinids or Arnulfings are the members of a family of Frankish nobles whose select scions served as Mayor of the Palace, de facto rulers, of the Frankish kingdoms of Neustria and Austrasia that were nominally ruled by the Merovingians.
The dynasty is usually considered to have been founded by Saint Arnulf, bishop of Metz in the early seventh century, who wielded a great deal of power and influence in the Merovingian kingdoms.
His son Ansegisel married Saint Begga, the daughter of Pepin of Landen, and their son was Pepin of Heristal. It is from Pepin's grandfathers that the dynasty receives its earlier (pre-Martel) names: Arnulfing or Pippinid.
The mayoralty of the palace of the kingdom of Austrasia began in the family with Ansegisel and continued with Pepin of Heristal. Pepin conquered Neustria at the Battle of Tertry in 687 and spread Arnulfing authority over all the Franks.
The dynasty effectively ended with the death of Pepin, who was succeeded by his illegitimate son, Charles Martel. Pepin had legitimate grandsons at his death, but they failed to win power, and the line died out.
Charles Martel went on to found a new line of the family, which historians named the Carolingian dynasty after Martel.