The Prologue is the first section of four books of the Prose Edda, and consists of a euhemerized account of the origins of Norse mythology: the Norse gods are described descended from the Trojans. The genealogy presented by Snorri begins with Priam. Priam's daughter Tróán married king Múnón or Mennón. Their son was Trór, or Thor, who was fostered in Thrace. Thor slew his foster father and married Sibil, identified with Sif. The line of descendants of Thor and Sif is given as follows: