Sunifred was the count of many Catalan and Septimanian counties; including Ausona, Besalú, Girona, Narbonne, Agde, Béziers, Lodève, Melgueil, Cerdanya, Urgell, Conflent, and Nîmes; and Count of Barcelona from 844 to 848.
He may have been the son[1] of Belló, Count of Carcassonne, or more probably, his son-in-law [2]. In 834, he was named count of Urgell and Cerdanya, which were at the time in the control of Aznar Galíndez I (an ally of the Banu Qasi), by Louis the Pious, Holy Roman Emperor. Sunifred conquered Cerdanya in 835 and Urgell three years later (838). By the death of Bernard of Septimania, he received the march of Gothia. He then augmented his domains when Conflent fell into his hands, as count of Cerdanya, on the death of Bera II.
In 841, the Moors invaded Barcelona and marched against Narbonne through the region of Cerdanya. Sunifred stopped them cold in battle, an event which certainly influenced Charles the Bald's appointment of him to the counties of Barcelona, Ausona, Besalú, Girona, Narbonne, Agde, Béziers, Lodève, and Nîmes in 844.
Throughout his reign, he was aloof of William of Septimania, son of Bernard, who had risen in 844 against Charles the Bald.
He died in 848 and his counties were given away by the Frankish king.
Sunifred I married Ermesende, and had the following children:
| Preceded by Aznar Galíndez I |
Count of Cerdanya Count of Urgell 834–848 |
Succeeded by Solomon I of Urgell |
| Preceded by Bernard of Septimania |
Count of Barcelona 844–848 |
Succeeded by William of Septimania |