Calling on the name of any entity/diety that you attribute power to, will help. Calling on the name of "Jehovah" or saying Yahweh or yudhehvavheh could be successful because of the power you attribute to this diety (and the fact that others attribute power to him also makes him more potent).
It's really your belief system....because ultimately, everything is belief or perception.
Are you personally having problems with "entities"? Is something causing you to be afraid?
~Brigid