[Dave Elias]

Yod-Hay-Vav-Hay are more modern names for the letters, and are thus don't really give us a correct pronounciation as it originally appeared. It is generally reckoned that the letters Yod-Hay-Vav-Hay are not direct substitutes for the original Yud-Hey-Waw-Hey in terms of diction.

[safisoft]

Yud-Hey-Waw-Hey

I know that some "Sacred Name" people have argued thus, as well as many seminarians who have had to learn German before Hebrew, but I would simply point out that it is more likely German and Yiddish influences that gave us "Waw". Regardless, the pronunciation may in fact be as academic as how early English was pronounced... for instance, all our "J"s - can you prove they sounded like "JAY" as opposed to "IAY"?

My points were not so much about pronunciation, but about the letters themselves.