I recently filled out a web form on a state government site that asked me to enter the name of my immediate supervisor at my previous job. His last name has an

I recently filled out a web form on a state government site that asked me to enter the name of my immediate supervisor at my previous job. His last name has an apostrophe (starts with "O'"). The site gave me an error message: "Your immediate supervisor's name must only contain letters (A-Z), hyphens, or spaces." (At least it didn't actually impose the apparent restriction that the name must be ALL CAPS.)