Autocomplete Question

I have an autocomplete form field that works wonderfully. It currently pulls the suggestions nicely from the database as it should.

However it only allows input of what is in the database. Is there a way to add a static value as an option?

For example, my autocomplete field draws from a list of names. I would like to add the option of ‘None’ to the field as a static value. Much the same way drop down menus have a mixture of dynamic and static values.

Is leaving the field blank my only option?