Sorry to copy & paste, but I don't have time to type this all out. Just came across this and thought it interesting and might help with this discussion.
http://www.wwyd.org/Studies/Yahuwah_or_Yehovah.html
HalleluYAH means "Praise Yah"
Hallelu (??? Strong's H1984), in this context, means to "praise," almost ecstatically, and is a second-person imperative masculine plural form of the Hebrew verb hallal. From this we know that what may follow this word is the SUBJECT of the praise...
Yah (?? Strong's H3050) is a shortened form of YHWH, the name for the Creator. Almost every honest language scholar admits this, as well as the timeless, unchanged way it is pronounced throughout generations, in all languages, even today.
Nowhere, in any language, in any culture that I know of, is HalleluYAH pronounced "Hallelu-YEH." Scholars and proponents of the pronunciation Yehovah/Jehovah may offer all kinds of complex excuses to explain away THE OBVIOUS, but the OBVIOUS remains, the name of the Creator begins with YAH (YaHuWaH), not YEH (Yehovah).