There's a lot going on in the mind and brain. There's probably something neurological with stuttering (parts of the brain not communicating with each other as they do in non-stutterers). There are also psychological and social factors that feed into the whole system of speaking. The more you can get sorted, the easier speaking becomes. The example you just gave could be explored in so many different ways. There's a history of being made fun of, which is unpleasant, so avoidance becomes a natural inclination. This feeds right back into the speech mechanism in the brain which already has a way of preventing speech. But you need to speak so you have to push your way through the block, potentially creating the very situation you want to avoid. This creates more tension and inner conflict as parts of you want to speak and parts of you don't. Your own identity may be at play, too. If you're not settled in who you are, how well you know yourself, how you think others perceive you, if you feel fundamentally flawed as a human being (even chastisement can have severe long-lasting impact on a sensitive child), even if you can't fully comprehend or articulate this, then the very act of saying your name comes bundled with a host of confusion, doubts, and inner conflict. Shove all that through the funnel of the speech production system and inevitably it won't fit unless you can employ particularly good techniques that help you focus on what's necessary and filter out the confusion, or take time to introspect and figure this stuff out enough that techniques aren't needed because you've gained enough self-clarity that self-expression becomes a breeze. This is only scratching the surface of how deeply I've thought about the phenomenon of stuttering, the various causes and factors, and more importantly, what you can actually do about it.