From A Wiki of Ice and Fire
Ser Ulwyck Uller is a knight from House Uller and the younger brother of Lord Harmen Uller. He is the uncle of Ellaria Sand, the paramour of Prince Oberyn Martell. This makes him the granduncle of the four youngest Sand Snakes: Elia, Obella, Dorea and Loreza.
A Storm of Swords
Ser Ulwyck is one of the nobles who accompany Prince Oberyn Martell to King's Landing for the wedding of King Joffrey I Baratheon.
A Dance with Dragons
Ulwyck is present along with his brother at the feast when Ser Balon Swann arrives in Sunspear to deliver the head of Ser Gregor Clegane. He refuses to drink when Ricasso raises a toast to King Tommen I Baratheon.
- ↑ 1.0 1.1 A Storm of Swords, Appendix.
- ↑ A Storm of Swords, Chapter 38, Tyrion V.
- ↑ A Dance with Dragons, Chapter 38, The Watcher.