Currently, Allura wiki pages have exactly one name. That name is displayed to visitors in the title bar of the page, and it is used for linking.
This leaves wiki authors with two options:
A solution would be a list of allowable aliases for each wiki page. While the title bar of each page could still show a human-readable text, other wiki pages (and other markdown texts in Allura in general) could refer to the wiki page by its page alias/one of its page aliases, which can be any kind of persistent page identifier devised by the wiki author.