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Jason Lannister

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House Lannister.svg
Jason Lannister
House Lannister.svg
Title Ser
Lord of Casterly Rock
Shield of Lannisport
Warden of the West
Allegiance House Lannister
Born In or between 89 AC and 97 AC[1]
Died In 130 AC, at the Red Fork
Spouse Lady Johanna Lannister
Book(s) The World of Ice & Fire (mentioned)
The Rogue Prince (mentioned)
The Princess and the Queen (mentioned)

Jason Lannister was Lord of Casterly Rock and head of House Lannister during the reigns of Viserys I and Aegon II Targaryen.[2]


In 112 AC, before he was lord, Ser Jason and his younger twin, Ser Tyland, vied for the hand of Rhaenyra Targaryen without success.[3]

During the civil war known as the Dance of the Dragons (129 AC-131 AC) Jason was loyal to King Aegon II and the greens against Rhaenyra's claim, while Tyland was Aegon's master of coin.[2] Jason was killed by Pate of Longleaf in the Battle at the Red Fork, however, which left Casterly Rock in considerable disarray.[4] Jason's widow, Lady Johanna Lannister, defended the westerlands from the Red Kraken, Lord Dalton Greyjoy.[5]


  1. See the Jason Lannister calculation
  2. 2.0 2.1 The Princess and the Queen.
  3. The Rogue Prince.
  4. The World of Ice & Fire, The Targaryen Kings: Aegon II.
  5. The World of Ice & Fire, The Iron Islands: The Red Kraken.