Starborn is the key, I think. Since Harry is starborn and has power over Outsiders and Outsiders have no power over him, Harry can say his name, or in this case use his name without harm or fear of attack from using it.
Furthermore, there was a WOJ that, basically, Harry is a somewhat unique case where others trying to use his name against him would instead be making themselves vulnerable rather than getting power over him. That was in reference to Harry as narrator ending SF with his name and "conjure by it at your own risk".
That might be another aspect of being starborn besides just immunity to and influence over outsiders that hasn't been explored yet.
