In the books
In the A Song of Ice and Fire novels, House Uller is one of House Martell's most powerful vassals, and reputed to be impulsive and unpredictable. There's a saying in Dorne that goes "Half of the Ullers are half-mad, and the other half are worse." Their arms are a rayonne yellow over crimson while their words are unknown.
- Lord Harmen Uller, Lord of Hellholt
- Ellaria Sand, his bastard daughter
- Ser Ulwyck Uller, his brother
- House Uller at A Wiki of Ice and Fire (spoilers from the books)