Capabilities/moodle/site:viewfullnames
From MoodleDocs
moodle/site:viewfullnames allows a user to view the full name of other users all the time.
Note: You are currently viewing documentation for Moodle 2.6. Up-to-date documentation for the latest stable version of Moodle may be available here: Capabilities/moodle/site:viewfullnames.
moodle/site:viewfullnames allows a user to view the full name of other users all the time.