[JshWright]

I feel exactly the opposite... Why pick a reasonably common first name? Seems like a recipe for confusion...

There is a reason names like "Siri" and "Cortana" were chosen (though I'll grant you "Alexa" is a reasonably common name as well).

[Killswitch]

Cortana is the name of an AI in Halo series. That's why Microsoft chose it.