From A Wiki of Ice and Fire
|Title||Lord of Sweetport Sound|
|Book||A Storm of Swords (mentioned)|
Lord Sunglass is the brother and heir of Lord Guncer Sunglass.
A Storm of Swords
After the death of his brother, he becomes the new Lord of Sweetport Sound. He abandons Stannis Baratheon's cause and sails to Volantis for fear of being burned by Melisandre like his brother.
- ↑ 1.0 1.1 A Storm of Swords, Chapter 36, Davos IV.