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.
The heir to William I of Cerdanya and Sancha of Barcelona's family line, he received Berga from his father in 1094. Following the passing of his brother William-Jordan in 1109, he gained possession of Cerdanya.