I did actually consider this when I was younger! My name would be Emma Holmes (I am a big fan of Emma Watson and Sherlock Holmes). I wanted to write a romantic eBook about detectives solving crimes and I didn't want my name on it. Well it turned out that writing a book is harder than a 12 year old can imagine so I gave up and wrote a short story about those two detectives.
What about you, what was your pseudonym?