Prince Harry and William in Canada?

I am a American and I know of them. I don't I know I thaught more people outside of britian would know about them but they don't. In my college cl yesterday which is comprised of people mostly from Canada and U.S we had to answer questions about different world knowledge. One question was what is the name's of Princess Diana's two sons? Whose the eldest in line? Only about 4% of the cl could recongize them by face or name. And canada is a commonwealth state, I was shocked. Royalty is kind of interesting to me but over here but I thoughts Canadians would no more about them because it is common wealth state