Dynasty of Sword and Ax

The events take place in 1054. The main character named Olav was a bastard of a family of Vikings who lived in the modern territory of Denmark. Olav decided to find out his family roots, he wants to know who his ancestors were. After some time, he learns that there are both Vikings and Englishmen in his family. Later, he learns about the family ring, about his father's sword. And he also learns how famous his family is.