How did Hrothgar come to know Beowulf's father? Does beowulf feel indebted to Hrothgar for his past kindness to the family?

"Hrothgar is the king of the Spear-Danes when Beowulf arrives in their land, ready to fight the demon Grendel. Many years earlier, Hrothgar paid money to the Wulfings to resolve a blood feud they had with Ecgtheow, Beowulf's father. As a result, Beowulf feels some loyalty toward Hrothgar."