Next time you give a test, design some sort of trick question like, What is your favorite Beatle album, and assign an extra point or some such thing, and see of all of your Jenns answer the same. I figure that if someone named Jenn knows who the Beatles are, then it may be an intersting test to see what they think.
I knew one Jenifer (Jenni). When we met, she had no idea who the Beatles were. After working with me for just over a year, her wedding included 13 Beatles songs... all at her request. See, the younger generation can learn from us old farts.
Thanks for the suggestion! I think I'll also include a question like, "what is your favorite musical group"?