Requiring users to include their name at registration

Greetings,

I’m wondering if there is a way to require users to enter their name when they register.

I run an alumni wordpress web site, and I’d like to say something along the lines of “You must enter your name to register” or maybe “You must enter your name: Enter your class year for your first name, then at least your first name and last initial for your last name.”

Any help? Thanks.