House Costayne
Appearance
House Costayne are a noble house of Andal origin and a vassal of House Hightower of Oldtown. The seat of House Costayne is the Uplands.

History
They fled from Valyrian expansion in Andalos to Oldtown in the east, where they explained their situation to Lord Byren Hightower. He gave them land not far from Oldtown, and they became his vassals.
Notable Members
- Lord Dudley Costayne – Lord of Uplands under the rule of King Gunthor 'Whitehand' Gardener during the Andal Invasions. He fled from Andalos to Oldtown.