DC Merlin

I have trouble searching Merlins, I thought to narrow the search down if we merge DC Merlins

http://www.comicvine.com/merlin/29-5335/ - the real one

dupes:
http://www.comicvine.com/merlin/29-35350/
http://www.comicvine.com/merlin/29-35054/
http://www.comicvine.com/merlin-the-magician/29-39618/



they are under " National Periodical Publications" and "National Periodical Publications Inc", but the character have obviously moved over to DC

hmm...even National Comics Publications has DC characters....weird

edit:
...and two more National Comics Publication and National Comics Publishing are they related or something?