How to rename an icon in Launchpad (Mojave)?

How can the name under an icon in Launchpad (Mojave) be renamed? I tried suggested ways but none worked. One way I found is to open the icon and have it in the tray on the desktop. Double click (two fingers) the tray icon and a menu appears. Select Options>Show in Finder and then in Finder you can rename it. Are there any other ways.