A WikiName is a word that contains a group of words with spaces removed (and with starting letters of the words capitalized - Camel Case Smashed Together Words), e.g. SystemInfo. WikiNames automatically become hyperlinks to the WikiName's page. Uppercase and lowercase letters are determined by the configuration of the wiki software. The default configuration should work for UTF-8 characters (digits are treated as lowercase characters).
When you click on the highlighted page title (i.e. WikiName on this page), you will see a list of all pages that link to the current page. This even works on pages that have not been created yet.