The comitatus relationships shown in Beowulf are Hrothgar and his men, and Beowulf and his men.
In Anglo-Saxon society, a comitatus relationship was the relationship between a ruler and his thanes. This relationship was one of honor and respect and it was based on the thanes' loyalty to his lord. While the thanes provided protection to the ruler, their lord offered them a share of his wealth in exchange. Moreover, although Hrothgar is Beowulf's lord in the story, Beowulf is also the lord of his thanes. Therefore, Beowulf owes protection to the ruler and fights for him, but, at the same time, he is protected by his men.