That's just a web site with no academic authority.  Just because you are providing a link doesn't mean you can include any bullshit that you want in Wikipedia articles.  Here is a link to Iranica's index, witth multiple entries on both Afghanistand and Aryana.  Show me where it says Aryana or Ariana is or was in Afghanistan.  I think encyclopedia Iranica with hundreds of scholars working on it, each a world authority in his/her respective area of experties, is a little more authoritative than a web site of the embassy of Afghanistan.