Minecraft wiki entry for Name_Tag, associated text: To use a name tag, the player must first rename it using an anvil.
A wolf that has been renamed using a name tag.
A creeper renamed using the name tag.
A wither renamed using a name tag. The custom name takes place of "Wither" over the health bar as well.
How to use "Grumm" and "Dinnerbone" name tag easter egg and lead to make another animal Yo-yo.
A horse using the "Grumm" or "Dinnerbone" easter egg to be rendered upside-down.
Name Tag found in a mineshaft chest.