From A Wiki of Ice and Fire
|Theories may be removed if ...|
- Urrathon and similar names (such as Urragon) are common among the ironborn.
- Euron has been to Qarth.
- Another character named Urrathon, High King Urrathon IV Goodbrother, is known as "Badbrother". Some readers have taken this as a hint by George R. R. Martin, as Euron is a bad brother to Balon, Victarion, and Aeron.
- Urrathon Badbrother was known for his arrogance and impiety, and was opposed by the priests in the kingsmoot. The exact same can be said for Euron Greyjoy.