The Lannisters are one of the richest and possibly the most powerful families in all of Westeros. They were led by Lord Tywin Lannister who was often accompanied by his loyal brother Kevin. The Lannisters of Casterly Rock are related to the Lannisters of Lanisport and are often allied closely with their cousins.
The Lannisters have form marriage alliances with many great houses of Westeros including the Baratheon’s, Freys and Tyrells.
Tywin Lannister served as Hand of The King to three Kings including Ares Targareon, Joffery Baratheon and Tommen Baratheon.
Jaime Lannister was the youngest knight to be selected to the Kings guard.
Cersei Lannister was the Queen to Robert Baratheon and would serve as Queen regent for her two sons.
Tyrion Lannister would serve as Hand of the King to Joffery Baratheon and later Daenerys Targaryen .