“Sunicfredus” donated property to the church of Urgell by charter dated 819. Emperor Louis I granted "villam…in pago Narbonensis…Fons-coopertus" to "fideli nostro Sunicfredo" by charter dated 829, which states that "Bosrello patri suo" had previously held the property. He established himself as count in the area known as the "March of Spain", south of the Pyrenees. He apparently led a revolt of the indigenous [Visigothic] population against Bernard de Septimanie (father of Bernard "Plantevelue"). He conquered Cerdanya and Urgell in the 830s, checking the Moorish expansion. "Suniefredus" donated property to Urgell by charter dated 3 Jan 840.
Marquis [of Septimania]: Charles II “le Chauve” King of the West Franks confirmed rights of Spanish settlers in the diocesis of Béziers, after "Notoni archiepiscopo...et Elmerado...palatii nostri comiti, Suniefrido etiam marchioni et Suniario comiti" reported on the question, by charter dated 19 May 844. It is supposed that Seniofredo´s marquisate was Septimania, but this cannot be confirmed beyond doubt. There is no indication of the date of his appointment.
He was killed in a counter-attack by Guillaume, son of Bernard de Septimanie, in 849. 1
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