User blog comment:Skeith9/Heroic Spirits Speculation/@comment-24754018-20140527111837/@comment-24754018-20140527112552

Sources:

Tvtropes, []: "The name "Brave Heart" was actually given to Bruce, NOT Wallace."

Wikipedia, []:"The "brave heart" refers in Scottish history to that of Robert the Bruce, and an attribution by William Edmondstoune Aytoun, in his poem Heart of Bruce, to Sir James the Good: "Pass thee first, thou dauntless heart, As thou wert wont of yore!", prior to Douglas's demise at the Battle of Teba in Andalusia."

And http://thehande.wordpress.com, []: "The most notable fact of all is that the name “Brave Heart” actually refers to Robert the Bruce and not William Wallace. After his death, Robert’s heart was literally carried into battle, giving birth to the nickname."