I have posted this thought before, but it was a long time ago.
My aunt named her sons
Thomas and
Nicholas. She was very clear from the beginning that they were not to be called anything but
Thomas and
Nicholas, and would always be quick to correct those that called them anything else. This worked for a while, but when they got into junior high and high school, it was unavoidable. They are known to their friends at school as
Tom and
Nick... but to the family, they are known as
Thomas and
Nicholas.