How can I change the title of a Safari shortcut or app on iOS? I would like to be able to change the title of a shortcut (especially web shortcuts set as icons). Is this possible?

For example, I have a Safari shortcut for Facebook. As an icon, it's labeled "Facebook". Can I change that to "m.facebook" or something else?

If so, how?
Names of apps cannot be changed on iOS unless you jailbreak and use some tweak. Although shortcuts made from Safari using "Add to homescreen" option can have custom titles. The title cannot be changed once it's been  added to the homescreen.