Which Frisian queen's tragedy is recited by a scop in Beowulf?

Hildeburh is the Frisian queen whose tragedy is recited by a scop in Beowulf.

Hildeburh is married to Finn, lord of the Frisians, but she is also the sister of Hnæf, a Danish prince. Her marriage is meant to join hostile peoples, yet the peace fails when violence erupts at Finn’s stronghold. Hildeburh loses her brother Hnæf and her son, who is also Finn’s child, in the fighting.

The scop describes her grief and the shared funeral pyre on which both Hnæf and her son are burned. This makes Hildeburh a tragic figure caught between competing loyalties: loyalty to her Danish birth family and loyalty to the Frisian household created by marriage. The episode then turns toward vengeance, as Hengest eventually kills Finn and takes Hildeburh back to her people.

Hildeburh is often confused with Wealhtheow, Hrothgar’s Danish queen, or Freawaru, Hrothgar’s daughter. The Finn episode in Beowulf is related to the separate Finnesburg Fragment, but Hildeburh does not appear in the surviving fragment.