|Born||In or between 285 AC and 287 AC|
|Book(s)|| A Game of Thrones (appendix)|
A Clash of Kings (mentioned)
A Storm of Swords (mentioned)
A Feast for Crows (mentioned)
A Dance with Dragons (mentioned)
|Played by||Dean-Charles Chapman|
|TV series||Season 3|
Martyn Lannister is a member of House Lannister. He is the third son of Ser Kevan Lannister and Lady Dorna Swyft and twin to Willem. He is a squire. In the television adaptation Game of Thrones he is portrayed by Dean-Charles Chapman.
A Clash of Kings
A Storm of Swords
After the murder of his twin brother Willem Lannister and his cousin Tion Frey at the hands of Rickard Karstark and his men, King Robb fears for his survival. Guilt-ridden over Lord Karstark's actions, he triples the guard around Martyn and arranges for him to be exchanged for Robett Glover. In exchange for the freeing of Robett Glover at Duskendale, Robb has Rolph Spicer deliver Martyn to Lannister forces at the Golden Tooth.