The Book 2 of the Gesta Danorum by Saxo Grammaticus contains roughly the same information as the Chronicon Lethrense and the Annales Lundenses, i.e. that Ro (Hroðgar) and Helgo (Halga) were the son of Haldanus (Healfdene). When Haldanus died of old age, Ro took the land and Helgo the water. One day during his sea roving, Helgo arrived at Thurø, where he found and raped the young girl Thora, which resulted in Urse (Yrsa). When Helgo after many years returned to Thurø, Thora avenged her lost virginity by sending Urse to Helgo who, unknowingly raped his own daughter. This resulted in Roluo, who was a gifted man, both physically and intellectually and as brave as he was tall. After some time Helgo repelled a Swedish invasion, avenged Ro by killing the Swedish king Hothbrodd, and made the Swedes pay tribute. However, he committed suicide due to shame for his incestuous relationship with Urse. Roluo succeeded him.
The new king of Sweden, Athislus (Eadgils), thought that the tribute to the Daner might be smaller if he married the Danish king's mother and so took Urse for a queen. However, after some time, Urse was so upset with the Swedish king's greed that she thought out a ruse to run away from the king and at the same time liberate him of his wealth. She incited Athislus to rebell against Roluo, and arranged so that Roluo would be invited and promised a wealth in gifts.
At the banquet Roluo was at first not recognised by his mother, but when their fondness was commented on by Athisl, the Swedish king and Roluo made a wager where Roluo would prove his endurance. Roluo was placed in front of a fire that exposed him to such heat that finally a maiden could suffer the sight no more and extinguished the fire. Roluo was greatly recompensed by Athisl for his endurance.
When the banquet had lasted for three days, Urse and Roluo escaped from Uppsala, early in the morning in carriages where they had put all the Swedish king's treasure. In order to lessen their burden, and to occupy any pursuing warriors they spread gold in their path (later in the work, this is referred to as "sowing the Fyrisvellir"), although there was a rumour that she only spread gilded copper. When Athislus, who was pursuing the escapers saw that a precious ring was lying on the ground, he bent down to pick it up. Roluo was pleased to see the king of Sweden bent down, and escaped in the ships with his mother.
A young man named Wigg was impressed with Roluo's bodily size and gave him the cognomen Krage, which meant a tall tree trunk used as a ladder. Roluo liked this name and rewarded Wigg with a heavy bracelet. Wigg, then, swore to Roluo to avenge him, if he was killed.
Roluo later defeated Athislus and gave Sweden to young man named Hiartuar (Heoroweard), who also married Roluo's sister Skulde. Skulde, however, did not like the fact that her husband had to pay taxes to Roluo and so incited Hiartuar to rebell against him. They so went to Lejre (a town which Roluo had built) with arms hidden in the ships, under the pretense that they wanted to pay tribute.
They were well-received, but after the banquet, when most people were drunk asleep, the Swedes and the Goths (i.e. the Geats) proceeded to kill everyone at Roluo's residence. After a long battle, involving Roluo's champion Bjarki, who fought in the shape of a spirit bear until he was awakened by his comrade Hjalti, the Geats won and Roluo was killed.
Hiartuar asked Wigg if he wanted to fight for him, and Wigg said yes. Hiartuar wanted to give Wigg a sword, but he insisted on receiving it by taking the hilt. Having the hilt in his hand, Wigg pierced Hiartuar with the sword and so avenged Roluo. Swedes and Geats then rushed forward and killed Wigg. The Swedish king Høtherus (based on the god Höðr), the brother of Athislus, succeeded Roluo and became the king of a combined Sweden and Denmark.
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