|Book(s)|| A Storm of Swords (appears)|
A Feast for Crows (mentioned)
A Dance with Dragons (appears)
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
A Feast of Crows
He returns to Dorne along with most of the other Dornish nobles who went to King's Landing to bring the body of Oberyn Martell home.
A Dance with Dragons
He 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.