Wilfred the Hairy in the context of "House of Barcelona"

The Bellonids (Catalan: Bel·lònides, Spanish: Bellónidas, French: Bellonides), sometimes called the Bellonid Dynasty, were the counts descended from the Goth Belló who ruled in Carcassonne, Urgell, Cerdanya, County of Conflent, Barcelona, and numerous other Hispanic and Gothic march counties in the 9th and 10th centuries. His most famous grandson was Wilfred the Hairy, who founded the House of Barcelona, rulers of the County of Barcelona from 878, and since 1164 the Crown of Aragon, until the end of the reign of Martin the Humane in 1410.

Since the early years of the 10th century all of the eastern counties of the Hispanic March and the counties of Conflent, Carcassonne, Foix, and Razès of the Gothic March were ruled by Belló's descendants. This would have favored the co-ruling of some territories, and a clan-like network of mutual support, although they would have also been exposed to the risk of endogamy.

Bello (c. 755 – 810) was Count of Carcassonne from 790 until his death. He was the founder of the Bellonid Dynasty of Carcassonne and Razès which reached its apex in Wilfred the Hairy, progenitor of the House of Barcelona.

Bello married Ermentrude de Ampurias, several children have been suggested for him:

Wilfred II or Wifred II, also known as Borrell I or Borrel I (Guifré II Borrell I in Catalan), was Count of Barcelona, Girona, and Ausona from 897 to 911, succeeding his father, Wilfred I the Hairy. His mother was Guinedilda.

Upon his father's death, the patrimony was divided between his sons Wilfred ΙΙ, Sunifred ΙΙ, Miró and Sunyer. Sunyer (the youngest) assisted Wilfred II in the governing of his three counties, as he was a minor at their father's death. Upon Wilfred II's death in 911, his counties passed to Sunyer. Wilfred II founded and was buried at Sant Pau del Camp monastery in Barcelona. The executor of his testament was Bishop Idalguer of Vic.