Changing the Unit's Name with triggers

How is to change the unit's name/ proper name with triggers? (Not the way that you replace the unit). I'm trying to store the unit's name in a variable and then set it to it's proper name/ internal name. Well, there should be a way to do that, because if you type, for instance, <RawAbilityname, RawValuename> the object editor will show exactly the desired value in the ability editor. Isn't this a variable call? May it be used to change to change the unit's name by string variables? How?

Currently there is no way to change a units name.

Create a copy of your unit with the other name and then create a new ability from one of the orcish chaos spell. Change the target unit id of the chaos spell to the unit id of your second unit.

When you want to change the name of your first unit just use the trigger action Unit - Add Ability to add the new chaos ability to your unit and it will morph to your second unit having another name.