Who said "A man's worth is measured by his deeds, not his birth."?

This quote is attributed to Theon Greyjoy.

A man's worth is measured by his deeds, not his birth. - Theon Greyjoy

"A man's worth is measured by his deeds, not his birth."

Theon Greyjoy Success

"I am the Prince of Winterfell. I have no need to prove myself to anyone."

"What is dead may never die."

"You can't marry her. You're promised to me."

"I'm a Greyjoy. We do not sow."

"Success comes to those who never give up."

"Success is measured by happiness, not money."

"You make your own luck in this world."

"You have to be organized to be successful in anything."