I've created a couple doppelganger account to prevent impersonation and/or to maybe someday use as alternate accounts for public editing or what have you (but at present, I don't edit from any of them). Here's a list:
- Hayden Schiff (real name)
- IagoOnsi (stealthy typo)
- IagoQnci (stealthy typo)
- Qnsi (potential new username someday?)
- QnsiBot (in case I ever make a bot)
- Oxguy3 (old account)
- Oxguy the 3rd (alt of old account)
Of note, the account IagoQnsi2 is an impersonator; see Wikipedia:Sockpuppet investigations/JellyfishFilms/Archive#17 March 2016 for more info.