Final answer:
Tina Fey, full name Elizabeth Stamatina Fey, received the Mark Twain American Humor Prize in 2010, becoming its youngest recipient at that time.
Step-by-step explanation:
The person in question who became the youngest recipient of the Mark Twain American Humor Prize in 2010 is Tina Fey. Her full name is Elizabeth Stamatina Fey. Tina Fey is a renowned American comedian, actress, writer, and producer. She is best known for her work on the sketch comedy show Saturday Night Live (SNL) and for creating the acclaimed television series 30 Rock. Her witty humor and impressive career in television and film have made her an iconic figure in the American entertainment industry. Tina Fey's award-winning humor has often been compared to the satire and social commentary that Mark Twain was known for, making her a fitting recipient of an award that bears his name.