Marie Brennan is the pen name of Bryn Marie Neuenschwander. She uses a pen name because in her own words: "Because my legal name, as you may have seen on the site's front page, is Bryn Neuenschwander, which has caused me problems all my life. People mistake my first name for Bryan and think I'm a man, and they all-too-frequently can't spell or pronounce "Neuenschwander." (For the record, it's NOY-en-shvahn-der, although I'll also answer to NEW-en-shwahn-der, which is the Americanized pronunciation.) I've gotten used to these problems, and don't mind them so terribly much, but as a name to publish fiction under it seemed more trouble than it was worth. I want people to be able to find my books, after all." She chose the name Marie Brennan once again in her own words: " I wanted my pen name to bear some relationship to my legal one. "Marie" is my middle name, and "Brennan" kind of echoes "Bryn N."
Bryn Neuenschwander is a graduate student in cultural anthropology and folklore at Indiana University at Bloomington. She earned her B.A. in anthropology and folklore & mythology from Harvard University in 2002. She is currently studying fantasy and science fiction, with a particular focus on role-playing games.
All of the above information comes from her website http://www.swantower.com/