A Lannister is a name of fictional cast of drama serial game of thrones. Submitted by anonymous on November 27, 2019. Lannister. Lord Tywin Lannister was the head of House Lannister and Hand of the King for three different kings.He was the father of Cersei, Jaime, and Tyrion Lannister, and sole grandfather of the incest-born Joffrey, Myrcella, and Tommen Baratheon.