Theon Greyjoy
Fictional character
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Prince Theon Greyjoy is the only living son and heir of Lord Balon Greyjoy of the Iron Islands, and younger brother of Yara Greyjoy. Fandom
Played by: Alfie Allen
Notable alias: Theon Turncloak The Squid Prince
Title: Captain of Sea Bitch; Lord of Winterfell; Prince of Winterfell
Sister: Lady Yara Greyjoy
Created by: George R. R. Martin
Family: House Greyjoy; House Stark (foster family)
First appearance: Literature: A Game of Thrones (1996); Television: "Winter Is Coming" (2011)