RENAME

This TSO command will allow you to rename any NON-VSAM data sets

It has a pretty straight-forward syntax

RENAME 'old name' 'new name'

When ran against a PDS you can also specify an ALIAS parameter

If specified, this parameter will create another reference for a specific member.
The member set can now be called by either the new name or the old name, thus making it so that specific member data set will have 2 names.