Alaric and Eric (Old Norse: Alrekr and Eiríkr), according to legend, were two kings of Sweden. In the Ynglinga saga According to the Ynglinga saga, Alaric and Eric were sons and heirs of the previous king Agni. They shared the kingship. They were mighty both in war and sport, but were especially skillful horsemen 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): Ynglingatal then gives Yngvi and Alf as Alrek's and Eirík's successors. The Historia Norwegiæ presents a Latin summary of Ynglingatal, older than Snorri's quotation: Hogna is an error for Agne. Unlike Ynglingatal, Historia Norwegiæ gives Dagr as Alrekr's predecessor. Instead Alrekr precedes Agne and Agne is succeeded by Yngvi (incorrectly called Ingialdr). The even earlier source Íslendingabók cites the line of descent in Ynglingatal and it gives the same line of succession as Historia Norwegiæ: xi Dagr. xii Alrekr. xiii Agni. xiiii Yngvi. In Gautreks saga and Hrólfs saga Gautrekssonar Gautreks saga also makes Alrek and Eirík sons of Agni by Skjálf and co-kings and it was to them that the warrior Starkad fled after his slaying of King Vikar. Starkad served them first as a companions on their viking expeditions and then, after Alrek and Eirík had settled down, went on further Viking expeditions alone. But King Alrek had a short life, for Eirík struck Alrek dead with a bridle when they were out to train their horses and then ruled as sole ruler over Sweden. This version says that Eirík reigned for a long time as told in Hrólfs saga Gautrekssonar (Saga of Hrólf son of Gautrek). This second saga introduces Thornbjörg, the daughter of King Eirík and Queen Ingigerd, who was a skillful shieldmaiden and ruled over part of the kingdom. Thornbjörg