A good event name is recognisable, pronounceable and able to carry meaning. It should fit the audience and the tone of the event. Avoid overly descriptive names that sound generic. Those get forgotten.
A name that radiates something or sparks a feeling will stick. Also check whether the name is available as a domain and on social media. And check it has no awkward connotations internationally if you're drawing a broader audience. Live Impact helps come up with and test a name that works.