Rename files and folders in iCloud Drive on iCloud.com
You can change the name of files and folders in iCloud Drive.
Note: You cannot change the names of app folders, such as Pages, Numbers and Keynote.
In iCloud Drive on iCloud.com, tap Select, then select the file or folder you want to rename.
Tap in the toolbar that appears at the bottom of the screen, edit the name, then tap Done.