The King in waiting of the Wilderwest

Alvin the Treacherous from the book series How to Train Your Dragon by Cressida Cowell.also known as Alvin the Poor-but-Honest-Farmer, His Most Mighty Murderousness Alvin the Treacherous, Great High Chieftain of the Outcast Tribe, Thin Prefect of Rome, Alphonse the Talented but Emotional French Chef or Terrific Al) is Hiccup's arch-nemesis. He has been an enemy of Berk in general and Hiccup in particular ever since How to Bea Pirate. 

Like Hiccup and Snotlout's family, Alvin's family is also directly descended from Grimbeard the Ghastly, but through a different branch. He is the son of the Witch Excellinor and Algarick Ogglebert.