Here's the wikipedia link:
http://en.wikipedia.org/wiki/Seth

Seth is in the bible the third son of Adam and Eve.

Here's the wikipedia link:
http://en.wikipedia.org/wiki/Seth

Seth is in the bible the third son of Adam and Eve.

did he get eaten by a monster?!

There are a lot of Biblical names in LOST.

You might want to check them out on the name thread, and also you can share this info on the name thread:
http://www.thefuselage.com/Threaded/showthread.php?t=6990

After Cain killed Abel, they had Seth. Seth was supposed to be a lot like Adam and perhaps a "replacement" for Abel. He lived several hundred years, so I don't remember anything about him getting killed by a monster, to answer lostalex's question. (By the way, our Seth Norris wasn't chomped on or eaten that way or anything...he was just beaten to a pulp. Poor Seth. I wonder who his wife was and how she dealt with his disappearance/death.)