|Book(s)||A Game of Thrones|
Gowen Baratheon was the third son of a reigning Lord of Storm's End.
He was the last member of House Baratheon to marry a Lannister, Lady Tya Lannister. They had one son, who died in his infancy. His marriage was the last between houses Lannister and Baratheon until the marriage of Robert Baratheon and Cersei Lannister some ninety years later.