William The Conqueror was related to Hugh through his (half) sister, Emma de Conteville, so any male descents from him are of no use. It has been mathematically proven that all British are descended on at least one line from Edward 1, but finding a direct male descent from him is difficult. Even the royals don't have it. I have many descents, but all through females. Even descents from The Conqueror are unlikely to be in the male because 1.Robert Curthose had only one son (William Clito)who died childless in 1128 and one illegitimate son, Richard, who died childless in 112, in the New Forest. 2. William II died childless 3. Henry 1-his only son William died in the White Ship disaster, leaving his daughter Matilda to fight her cousin Stephen for the throne. His only verified illegitimate son to produce heirs was Robert of Gloucester. His eldest son, William, had one son and three daughters. The son died young. Robert's second became a Bishop. Three other sons are mentoned in wiki, but descent isn't given.Can't find anything around the net either, so it could be that they were childless. The Normans didn't do well with sons. Much better with daughters.