Yrsa, Yrse, Yrs or Urse (6th century) est probablement plus mythique que réelle.
Yrsa, Yrse, Yrs or Urse (6th century) was a tragic heroine of Scandinavian legend.
She appears in several versions relating to her husband, the Swedish king Eadgils, and/or to her father and rapist/lover/husband Halga (the younger brother of king Hroðgar who received Beowulf) and their son Hroðulf. The consensus view is that the people surrounding Yrsa are the same people as those found in Beowulf, and the common claim in Beowulf studies that Hroðulf probably was the son of Halga is taken from the Yrsa tradition. Several translators (e.g. Burton Raffel) and scholars have emended her name from a corrupt line (62) in the manuscript of Beowulf, although this is guesswork.
[source Wikipedia]
Yrsa was taken prisoner by, and made the wife of, King Helgi of Denmark. She later found out that King Helgi was her own father and her mother was Queen Alof the Great, wife of King Geirthjof of Saxland. Yrsa's son by Helge, Rolf Krake, later became king of Denmark.
[source Missouri Mule]