Not to be confused with Halbjorn.

Hallbjorn, son of Guthlaf, is sailor from Skellige who, on page in The World of the Witcher, tells story about death of Duny and Pavetta from islander's point of view. He remembers that night when daughter of Calanthe died well. He tells that time lot of skilled warriors assembled in king's fortress, all sad and whispering to themselves that it was Sedna Abyss who killed pair.