Alaric and Eric

Alaric and Eric (Old Norse Alrekr and Eiríkr ), were two legendary kings of Sweden.

In the Ynglinga saga

According to the Ynglinga saga, Alaric and Eric were sons and heirs of the previous king Agni by his wife Skjálf. They shared the kingship. They were mighty both in war and sport, but were especially skillful horsmen and vied with one another about their horsemanship and their horses.

One day they rode off from their retinue and did not return. They were found dead with their heads battered but no weapons with them save the bridle bits of their horses. Accordingly it was believed that they had quarreled and come to blows and had slain each other with their bridle bits. They were succeeded by Alaric's sons Yngvi and Alf.

However, in other sources, only Alaric died, and in the piece of Ynglingatal quoted by Snorri Sturluson it is only Alaric who dies explicitly. Eric's death seems to be a misunderstanding on Snorri's part due to an influence from the succeeding kings (see also the other sources below):