Actually, my name is Matti and I'm a girl. I get a lot of comments on it and - surprisingly - a few mispronunciations (/mɛti/). Since I'm in the US, few people know that it's a boy's name unless I tell them. Which I do voraciously since I think it's funny. My mom still says that it's a girl's name. But I suspect she just doesn't want anyone to know that she gave me a Finnish boy's name.
-- Anonymous User 1/16/2009
Matti also means 'mate', as in checkmate. It's short for 'shakkimatti'. Matti Meikäläinen is the Finnish version of Joe Bloggs. The expression 'olla matti kukkarossa' means to have no money. A person who is late or is often late can be called Matti Myöhäinen, regardless of gender. Nukkumatti is the usual name for the Sandman (the much rarer name being Unijukka).