Historical Rules · 27 September 2013
Rule 110.5c
Official source text from the 27 September 2013 Rules release
A spell or ability that creates a creature token sets both its name and its creature type. If the spell or ability doesn't specify the name of the creature token, its name is the same as its creature type(s). A "Goblin Scout creature token," for example, is named "Goblin Scout" and has the creature subtypes Goblin and Scout. Once a token is on the battlefield, changing its name doesn't change its creature type, and vice versa.