What is the proper noun of a classmate?

A proper noun the name of a specific person, place, thing, or a title. The proper noun for a classmate is the name of the classmate, or:

• Classmate Limited (educational supplies), Evergreen Park, IL
• Classmate Academy, Hyderabad, Andhra pradesh, India
• Jumping Jacks (brand) Classmate Shoes
• "Chinese Lessons: Five Classmates and the Story of the New China" by John Pomfret