[Auracle]

For real, it was insane to drop Cortana. Halo-aside, it’s a great name for an AI assistant.

[MengerSponge]

Deep lore, seems helpful, cute avatar, becomes evil? Yeah it's a perfect name for an AI assistant

[mentos]

And since Cortana isn’t a widely used name like Alexa, it spares a whole generation of people named Alexa from that inconvenience.