User blog comment:Roads/Duplicate Wikis/@comment-4527566-20120512131225/@comment-3235402-20120512135011

You can change a URL and wiki name, not to mention the wordmark, theme, and all that, though the first two require you to contact staff first.

It's just easier to make a new one and get staff to redirect your other one to a similar wiki (like, say, THIS ONE) if there is one.