We are commanded not to take the Lord's name in vain. Isn't He talking about His sacred Hebrew name, Y--H? Is it really necessary to write 'G-d' instead of 'God'? 'God' isn't His name. I don't have any information to back it up, but I bet that 'God' may have been the name of a pagan god before it was used to refer to the god of Abraham, Isaac, and Jacob by English-speaking people. In the same way, Allah was the name of a pagan god before the Muslims used it to refer to their one god. I've read that some Arabic-speaking Christian churches use the word 'Allah' to refer to God, the Father. Couldn't names like 'Zeus', 'Odin', and 'Jupiter' have been adopted just as easily as 'God'? Why is it necessary to write 'G-d'?