I know this can be a controversial topic, but I made it for fun.
Are you lonely and have no friends in real life? Do you want to meet more people? Are you a stalker?
Hello, fellow Wikians! Today, I'll share a blog post about finding out other people's information.
Step 0: Read their username
For example, User:Sannse has her first name as her username.
Another example, Jimbo Wales's Wikipedia name reveals his nickname and last name.
w:c:lyrics:User:Sean Colombo says it all.
Step 1: Visit their userpage
Another example, my Wikipedia user profile links to my Wikia profile, which reveals my first name and country.
Step 2: Try to find 'em on Wikipedia (or other wikis)
Step 3: Contact 'em using Special:Contact (works only on Wikia Staff)
Step 4: Use time travel
The page history of the User:Sannse page says that Sannse's former first name is Lisa.
Elin Zetterstand, ex-wife of Markus "Notch" Persson (the developer of Minecraft and founder of Mojang Aktiebolag), has her full name riiiiiiiiiight here.