Joffrey Lannister, born Joffrey Lydden, was the first King of the Rock of Andal descent. History. Ser Joffrey, a knight of House Lydden, was married to the only daughter of King Gerold III Lannister, who was of First Men ancestry. When the king died without male issue, Joffrey was crowned by a council and took the name of House Lannister. More @Wikipedia
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