Easy way to rename an app?
Some Launchers like Nova Launcher supports HIDE APPS and RENAME APPS

To Hide Apps in Nova Launcher:


Go To 'Nova Settings.'
Than Go to 'Apps And Widget drawer'.
Click on 'Hide apps' and Check the apps you want to hide.


Rename Apps in Nova:
* To rename app you have to long press the app you want to rename and than edit app option.