I think if an Alexa device were present in a home in which a person named Alexa lived, they would reconfigure the wake word. A more likely hypothetical would be

I think if an Alexa device were present in a home in which a person named Alexa lived, they would reconfigure the wake word. A more likely hypothetical would be one in which the murder was named was Alexa, and the surprised victim exclaimed, "Alexa, what are you doing here!?!"