Árni beiskur

Árni beiskur or Árni the Bitter (died 22 October 1253; Modern Icelandic: [ˈau(r)tnɪ ˈpeiskʏr̥]; Old Norse: Árni beiskr [ˈɑːrne ˈbɛiskz̠]) was an Icelander. He was a follower of Gissur Þorvaldsson who undertook the task of killing Snorri Sturluson.