pseunonym

Much like the word pseudonym, pseunonym is when one writes under a pen-name that is actually ones own name; a combination of the words pseudonym and synonym to form another, more useless word

"I'm thinking about becoming a writer. I'll write under the name Joe Christmas."
"Your name IS Joe Christmas."
"I know--it's a pseunonym."

by Laurence Fishburne May 5, 2007