Nor must I omit how Frode was wont to sprinkle his food with brayed and pounded atoms of gold, as a resource against the usual snares of poisoners.

While he was attacking Ragnar, the King of Sweden, who had been falsely accused of treachery, he perished, not by the spears, but stifled in the weight of his arms and by the heat of his own body.
Frode left three sons, Halfdan, Ro, and Skat, who were equal in valour, and were seized with an equal desire for the throne.

All thought of sway, none was constrained by brotherly regard: for love of others forsaketh him who is eaten up with love of self, nor can any man take thought at once for his own advancement and for his friendship with others.

Halfdan, the eldest son, disgraced his birth with the sin of slaying his brethren, winning his kingdom by the murder of his kin; and, to complete his display of cruelty, arrested their adherents, first confining them in bonds, and presently hanging them.

The most notable thing in the fortunes of Halfdan was this, that though he devoted every instant of his life to the practice of cruel deeds, yet he died of old age, and not by the steel.
Halfdan's sons were Ro and Helge.