Allow users to select preferred notification service

Is there any way to associate a person entity with their preferred notify service?

My family all has mobile phones, and we all have the HA companion app installed, but I haven’t found a way, other than guessing at names, to determine which notify service corresponds to which device and therefore a person.

For now, I’ve manually created notification groups with that person’s mobile_app notification service listed, so that I can refer to the service notify.[name] where name matches their person entity. I feel like this is something that should happen automatically. If not the mobile_app notify service, then allow that user to pick their preferred notify service.

Current, a user can opt into html5 notifications, but rather than a boolean switch, I think that should be a drop down where you could select any notify service you prefer.