Eftersom du har ställt denna fråga till Show, In Showverse, var Theon 8 år gammal när han togs av Lord Stark till Winterfell.
Theon: I'm a Greyjoy. We've been lords of the Iron Islands for 300 years. There's not a family in Westeros that can look down on us, not even the Lannisters.
Ros1: And what about the Starks?
Theon: I've been Lord Stark's ward since I was eight years old.
Ros: A ward - that's a nice word for it.
Season 1 Episode 5 - The Wolf and the Lion
HBO-tittarhandboken bekräftar också det:
As punishment and to ensure there would be no other uprisings, Robert forced Balon to surrender his only surviving son, Theon (then 8), for Ned Stark to raise as his ward at Winterfell.
1. Namnet korrigeras från Rose till Ros, tack vare Skooba