I don’t know if you can change the name EMO, but if you could change the name of your EMO, what name would you choose ?
EMO’s first name I believe won’t be changed as it how we call him and how he is programmed to respond when you call him. You can give EMO a last name as I believe you might already know (this feature was added in the latest firmware v1.4.0)
So you can give EMO a last name. If you have two EMO’s they will call themselves by their full name which will be EMO: One and EMO: Two for example.
Here is an explanation if you wanted to know how that worked.