I just found out that I am a descendant of one of the Kings of France, Childeric III. My brother found this out, and we have different moms, and some genealogist familiar with this bloodline asked him if he was me, because of my mom. Anyway, I am just trying to find out more about my heritage. If anybody knows anything about this topic(Merovingian dynasty) let me know. Thank you

How about its web site:

http://www.merovingiandynasty.com/

That topic is easily researched on Google search engine. You will find out quite a lot of information there.