|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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Quintius MacBoon was the head of the MacBoon clan. According to legend, he killed the head of the McClivert clan, Dugald McClivert in a drunken duel. The death led to the McClivert clan transfiguring the MacBoons into dangerous creatures known as Quintapeds, presumably including Quintius.