"You may not have my name but you do have my blood"
Now why would he say that he was his blood rather than say that he was his son
Probably bcuz it's basically saying the same thing (fathers/parents are known to say you are my flesh and blood...OT I just remembered tomorrow's Father's Day)...he didn't say he had Stark blood...he said he had HIS blood...imo it's a subtle but strong difference...I don't remember the exact quote...if he said he had Stark blood then I stand corrected