To see why His name is pronounced "Yahweh" I would point you to the following resource which I have checked out thoroughly and have found to be adequate and in agreement with what I have found on the pronunciation. I do not necessarily endorse the views of the author in other topics presented in this book or in other books by this author.

Click here to download the in depth study that proves His name is Yahweh (requires Acrobat Reader to read)

This is a chapter from the book entitled "The Sacred name" by R.Clover