|Allegiance||House Lannister of Lannisport|
|Book(s)|| A Feast for Crows (mentioned)|
A Dance with Dragons (mentioned)
A Feast for Crows
Rosamund was sent as a handmaiden to Princess Myrcella Baratheon when the princess went to Dorne. She was chosen by Tyrion Lannister to accompany her due to similarities in height and looks from afar, although her hair is straight while Myrcella's is curly. When Ser Arys Oakheart brought Myrcella to Princess Arianne Martell, he disguised Rosamund as Myrcella and claimed the princess had redspots, which would keep most people away in Sunspear, long enough for Ser Arys to be gone. While disguised, she curls her hair in order to resemble Myrcella.