Thanks for the question.
If you're interacting with another TextNow user their application will show the information within the First + Last name fields on the account. This is the only information that we display along with the phone number.
If you'd like to update the name on your account you can access it within the profile section of your TextNow application. Other than that, there is absolutely no way for anyone to get a hold of your information.
Please don't hesitate to reach out if you have any further questions or concerns!