Yahweh - A supposed concept

Yahweh is a very old word, but is a new word recognized and believed
 to be the name of God, not a title, by Christians.

Jewish Scholars pronounce and spell it differently and regard the actual name, not title,
 so sacred, and can be spoken only after toughly spiritually cleansing no more then once a year..

For more information:

Wikipedia, the free encyclopedia

http://en.wikipedia.org/wiki/Yahweh