The Westerlands
Source: A World of Ice and Fire pg. 194
A land of hills filled with gold, western sunset coasts, and ruled by blonde rich kids, it can only be California! Er, wait, no, this is the Westeros version of Cali: The Westerlands.
House Lannister
of
Casterly Rock
Major Houses
House Farman (Fair Isle)
House Crakehall
(Crakehall)
House Brax
(Hornvale)
House Marbrand (Ashemark)
House Westerling (The Crag)
House Lefford (Golden Tooth)
House Lydden (Deep Den)
House Prester (Feastfires)
Lesser Houses
House Algood
House Banefort
House Bettley
House Broom
House Clegane
House Dogget
House Estren
House Drox
House Fallwell
House Ferren
House Foote
House Garner
House Greenfield
House Hamell
House Hawthorne
House Hetherspoon
House Jast
House Leygood
House Kenning
House Lorch
House Moreland
House Myatt
House Parren
House Payne
House Peckledon
House Plumm
House Reyne
House Ruttiger
House Sarsfield
House Serrett
House Spicer
House Stackspear
House Swyft
House Tarbeck
House Turnberry
House Vikary
House Yarwyck
House Yew