Tywin was the head of House Lannister, the richest man in the Seven Kingdoms and Lord Paramount of the Westerlands. The Westerlands are one of the constituent regions of the Seven Kingdoms and House Lannister is one of the Great Houses of the realm. Game of Thrones 8x05 - Cersei and Jaime Death Scene - YouTube Cersei was the elder twin of Ser Jaim…
Cersei was the only daughter and eldest child of Lord Tywin Lannister and his wife Joanna Lannister, who was also his cousin.