Is it correct for an employer to address his secretary and other women employees by their first names?
— M.C.J., Detroit, Michigan
I myself dislike the idea. I think it’s a bad thing for an employer to start, because it makes his relationship with his employees too personal. When he must reprimand or discharge someone, it is hard to be objective. It also encourages outsiders to call the office staff, especially the girls, by their first names, which I think is destructive of office dignity.
from Amy Vanderbilt’s Everyday Etiquette, 1956