If a Person Who Commits a Felony is Called a Felon...

Aunty?..troubling.

You could also use “petty criminal,” since misdemeanors are considered “petty offenses.”

(From the old Norman/French “petit” meaning small or minor. Also used to ditinguish between “grand juries” and “petit juries” and “grand theft” and “petit theft” or “petty theft.”)