He was repaying his father's debt.
Beowulf have aved the Danes because his father had an unpaid debt to Hrothgar the king of Danes that saved his life before Beowulf was born, and because his father died he deeated Grendel to pay his father's debt
Wiglaf, a loyal warrior and kinsman to Beowulf, comes to his aid in his final battle with the dragon. Wiglaf is the only one of Beowulf's warriors who remains by his side during the fight, showing courage and loyalty in the face of danger.
Hrothgar is the King of the Danes that is helped by Beowulf, But he is descended from Scyld Sceafing. The term Danes come from the term Scyldings or Scyld danes. So the first Ruler of the Danes was Scyld Sceafing. The second was his son Beowulf the Dane.
Beowulf comes to Denmark to help King Hrothgar and his people by defeating the monster Grendel, who has been terrorizing the Danes and causing havoc in Heorot, the mead hall. Beowulf hears of their plight and sees an opportunity to prove his strength and valor as a warrior.
Beowulf was from Geatland (in modern day Sweden)
The keen-souled kinsman of Hygelac in Beowulf is Beowulf himself. He is a Geatish warrior who comes to the aid of King Hrothgar of the Danes to defeat the monster Grendel and his mother. Beowulf later becomes the king of the Geats and dies fighting a dragon.
Beowulf is a legendary hero who travels from Geatland to help the Danes by fighting the monster Grendel.
The king of the Danes. He was the first liberator in the poem which foreshadows the hero in Beowulf.
Beowulf hears of the Danes' plight when a messenger arrives seeking help from his kingdom. The messenger tells of how the Danes are being terrorized by the monster Grendel. Beowulf promptly decides to sail to Denmark to offer his assistance.
Geat; Danes
wife of the king of the Danes
Higloc, king of the Geats and Beowulf's uncle.