Suñer succeeded his father and his uncle, Isarn, Count of Pallars. Suñer ruled together with his brothers, who died in 995.
From 995 until his death, Suñer ruled Pallars together with his paternal nephew, Ermengol I of Pallars (the son of Borrell I).
Marriages and childrenEdit
Suñer was first married to Ermengarda/Ermentruda, his sister-in-law (the former wife of Borrell). Suñer and his sister-in-law were the parents of two sons – Raymond III of Pallars Jussà and William II of Pallars Sobirà – and a daughter, Ermengarda. The second consort of Suñer's was Countess Toda of Ribagorza, daughter of his cousin Raymond II, Count of Ribagorza.