House Estren of Wyndhall is a noble house from Westerlands. They've sworn loyalty to House Lannister a couple of centuries ago. Their ancectral seat is Wyndhall.
Their banner is the green cross on the white shield, with four eagles filling each gap the cross makes. Their words are, " Beneath our wings ".
Seat: Wyndhall Edit
Their seat is Wyndhall, a keep in Westerlands. It has three towers, and is situated on a small hill, and has a defensive structure.