William was born in 1130 in Mohun, Devon, England. He died at the age of 46 in 1176.
General Notes
He fortified his castle in behalf of Maud and made many incursions into the neighboring country. For these services he had the honour of being created Earl of Somerset and Dorset during Henry II reign, which title he enjoyed until his death. He was buried in the priory of Brewton of his own foundation.