What Dynasty am i from? What Was there Symbol? Who Am I?

Well i am Asian, to be more precise I am Korean. And i found out something really cool. My great great great great great (you get the idea) grandfather was a Korean king. I have nagged my parents so much but all they know is that i am either from the Goguryeo ( pronounced Ko-gu-re-oh) or Goryeo ( ko-e- oh) dynasty. I am sadly losing sleep over this and have finally decided to take my problem to the internet. (Horrible choice i know) since i cant turn any where else. So basically if anyone could explain the 2 dynamites and tell me there symbols maybe i might find out. Just anything you can tell me bout the 2. Hopefully i find out, i am royalty you know, Ah just pulling your legs everyone!...... maybe i should start a blog or something........