Bilius

Bilius Weasley or Prewett was Ron Weasley's uncle, and likely the source of his middle name. Bilius died twenty-four hours after having seen a Grim. It is not known if Bilius was from Molly Weasley's side of the family (The Prewetts) or Arthur Weasley's side, though it is likely that he was from Arthur’s side of the family as Arthur was one of three brothers.