A son of William I of Cerdanya and Sancha of Barcelona, he inherited Berga from his father in 1094. On the death of his brother William-Jordan in 1109, he inherited Cerdanya.
A scion of William I of Cerdanya and Sancha of Barcelona, he inherited Berga from his father in 1094. Upon the death of his sibling William-Jordan in 1109, he succeeded to Cerdanya.