Pages are named as they appear in the URL. A page is called an 'Article'. When we ask 'is it on the wiki' - we mean if you use that name - does a corresponding article or entry exist?
The page name appears after the /wiki/ in the URL
When article has multiple words, capitalize all the words like you would a title of a book. This allows one to differentiate words from wiki words.
Wiki words is another name for a page name.
If a wiki page already exists, add to that page. If you insist on using that name, just differentiate the name by adding 2, such as John 2.

Test

Start a work log named Yourname Log. If it exists, start a page Yourfirstname Yourlastname Log.
What is the name of this page?
What really do you do if you have an edit conflict?

Wiki Etiquette