The Aribonids were a noble family of probably Bavarian

Bavarii

The Bavarii were a Germanic tribe whose name emerged late in Teutonic tribal times. The full name originally was the Germanic *baio-warioz. This name has been handed down as Baiwaren, Baioaren, Bioras, latinised Bavarii, Baioarii. or Bavarii, Bavarians, Bajuwaren, Bajuvarii, Bajuwaren and Baiern....

 origin who rose to preeminence in the March of Pannonia

March of Pannonia

The March of Pannonia was a frontier march of the Carolingian Empire erected in the mid-ninth century against the threat of Great Moravia and lasting only as long as the strength of that state....

 (later Austria

March of Austria

The March of Austria was created in 976 out of the territory that probably formed the earlier March of Pannonia. It is also called the Margraviate of Austria or the Bavarian Eastern March. In contemporary Latin, it was the marchia Austriae, Austrie marchionibus, or the marcha Orientalis...

) in the late ninth and early tenth centuries. They are named after the Margrave Aribo

Aribo of Austria

Aribo was the margrave of the March of Pannonia, from 871 until his death...

.

The family maintained influence in Bavaria, Austria, and other parts of Germany (the Saxon eastern marches and the Rhineland) until the early twelfth century, when they disappear. Their earliest identifiable member was Arbeo of Freising

Arbeo of Freising

Arbeo of Freising was Bishop of Freising.He was a member of the Benedictine Order. At first a priest and notary under Bishop Joseph of Freising, he became in 763 abbot of the newly-founded monastery of Scharnitz...

. The Aribonids had a long-sustained feud with the Wilhelmines in the late ninth century. As the dukes of Great Moravia

Great Moravia

Great Moravia was a Slavic state that existed in Central Europe and lasted for nearly seventy years in the 9th century whose creators were the ancestors of the Czechs and Slovaks. It was a vassal state of the Germanic Frankish kingdom and paid an annual tribute to it. There is some controversy as...

 tended to support the Wilhelmines, the Aribonids were usually at war with the Moravians.

The Aribonids controlled the Archbishopric of Salzburg

Archbishopric of Salzburg

The Archbishopric of Salzburg was an ecclesiastical State of the Holy Roman Empire, its territory roughly congruent with the present-day Austrian state of Salzburg....

 for a long time. In fact, the family provided many high ecclesiastics; Aribo, Archbishop of Mainz

Aribo, Archbishop of Mainz

Aribo was the Archbishop of Mainz from 1021 until his death. He was Primate of Germany during the succession of Conrad II.Aribo disputed with the Diocese of Hildesheim the jurisdictional right over Gandersheim Abbey, but Pope Benedict VIII found in favour of Hildesheim, a ruling which Aribo...

, and Pilgrim, Archbishop of Cologne

Pilgrim, Archbishop of Cologne

Pilgrim was the archbishop of Cologne and archchancellor of Italy in the Holy Roman Empire, a dignity he obtained for all his successors....

, were Aribonids, as their names would suggest.