Board Thread:General Discussion/@comment-60.230.206.72-20130310032548/@comment-1894786-20151104030550

Both Shan-Yu's sword and Rumple's Dagger are based off of Kris Daggers, spiritual and wavy Indonesian daggers originating from East Asia.

It's merely a coincidence, and although the original version of the Mulan ballad has her fighting in a war with the Huns, all of their leaders were named Shanyu, it was a title, not a name. Shan-Yu the Disney character is just that.