How many surname begins with that letter if more than one surname begins with a letter besides A and O?

I do not really get this question, so I would have to say that I do not know the answer. I just think that if people would need to list down their names, placing them in alphabetical order will be the most ideal because it will be easier to find what you are looking for.

Listing down the different surnames in alphabetical order will also allow you to know how many people who are listed have the same starting letter for their surnames. If two surnames are the same, the order will be based on the letter that will be after the surname. For example, Smith, Jane, will be first on the list while John Smith will follow after.