Hugo

Everyone privately thought Hugo's name was absolutely ridiculous, and each had their own theories as to where it came from. James speculated that Uncle Ron and Aunt Hermione had been very, very drunk, although Lily stubbornly refused to believe that Hermione would ever go that far. Rose thought her mother had come across the name in one of her old History of Magic textbooks, probably from some gargoyle or troll or something or other. Roxanne just thought that Uncle Ron wanted to top Draco Malfoy in the business of unusual children's' names. Hugo didn't care much, he was a Weasley and that was good enough for him.

A/N- I'll leave you to decide which of the three theories you like best, so I won't include dialogue for this one! ;D