You will need
- connection to the Internet.
Login is not so little. Because if one Internet user came up with a good username, as a rule, he tries to use it at check in all social networks and forums. After all, the balance of one of the letters is much easier to remember than to invent again and again in different combinations.
Your search should start with social networking. "VKontakte", "My world", "Classmates", "My circle", e-mail, ICQ and the "Mail agent" is only a small part popular this time of sites and programs where registered millions of users. Maybe one of these tens of thousands of people is your friend.
Go to any of these sites under your username and password. Once you get access to all the features, you need to find the "Search" button. Available in all social networks without exception. In the menu that will appear on the screen, enter all the information, which have about the person. If you only know the username, and write it in the search box. After all these steps, click the button with the magnifying glass. It is usually located to the right of the search window.
Then already updated the page will show you all found for your search results, that is, the names of the people who use this or a similar username on the Internet. You will only have to browse their pages to find the right person and add to his friends.