A theme in a literary work is a recurring, unifying subject or idea, a motif that allows us to understand more deeply the character and their world. In Beowulf, the major themes reflect the values and the motivations of the characters.
One of the central themes of Beowulf, embodied by its title character, is loyalty. At every step of his career, loyalty is Beowulf's guiding virtue.
Beowulf comes to the assistance of the Danes (Scyldings) for complicated reasons. Certainly he is interested in increasing his reputation and gaining honor and payment for his own king back in Geatland. However, we soon learn that a major motivation is a family debt that Beowulf owes to Hrothgar. The young Geat is devoted to the old king because Hrothgar came to the assistance of Beowulf's father, Ecgtheow, years before. Now deceased, Ecgtheow had killed a leader of another tribe in a blood feud. When the tribe sought vengeance, Hrothgar, then a young king, sheltered Beowulf's father and settled the feud by paying tribute (wergild) in the form of "fine old treasures" (472) to Ecgtheow's enemies. Hrothgar even remembers Beowulf as a child. The tie between the families goes back many years, and Beowulf is proud to be able to lend his loyal services to Hrothgar.
