Also if you have someone named Bo. Gets even more confusing when they become an instructor...
On this same topic, "bo" is a Japanese word. The Korean word for staff is "bong". My former TKD instructor, an immigrant from Korea to the US, was always confused why the older students and parents would stifle giggles when he told them to get out their bong for a weapons class. Mr WaterGal had to explain it to him.