Tyrion Lannister is one of the youngest children of Joanna Lannister and Lord Tywin Lannister. Tywin, who is the chief at House Lannister, one of the richest man the Seven Kingdoms have ever seen along with the liege of Westerlands. The Westerlands are the integral regions of Seven Kingdoms and House Lannister of Casterly Rock is one of the Great Houses of the realm. He is the younger sibling of Jamie and Cersei Lannister. His mother passed away while birthing him. He is blamed for his mother’s death by many people.