Gunnlaugr Leifsson (died 1218 or 1219) was an Icelandic scholar, author and poet. He was a Benedictine monk at the Þingeyraklaustur monastery (Icelandic Þingeyrarklaustur) in the north of Iceland. Many sources (including Þorvalds þáttur víðförla) refer to him simply as Gunnlaugr munkr or Gunnlaugr the Monk. Source: Wikipedia (en)