His Name

Ex 6:3  He talks of having appeared to Avraham, Yitzhak & Yakov as El Shaddai & introduces himself to Moses here as YHVH (This gives more revelation of who He is and His character).

Names for God
The one that appears the most frequently in the Tanakh (Old Testament - Torah-Pentateuch, Prophets & Writings), 6,823 times is the Tetragrammaton YHVH, transliterated Ye-Ho-VaH.

Other Names are significant and shed light on the character & nature of God.
The Tetragrammaton means The Four Letters.

Gen 4:26 The men began to call upon the name of YHVH.

YeHoVaH OR Yawheh
The root of the name YHVH in Hebrew means "to be."  The letter V may well have been pronounced more like the sound W in ancient times. However, between the V or W pronunciation there is no difference in meaning, and therefore virtually no significance, in my opinion.

Biblical Hebrew was written only in consonants, as we see in the letters YHVH. Therefore, the main question of pronunciation concerns which vowel (points) to add to the consonants. The vowels can make a difference in the meaning. If we add the vowels - "e"-"o"-"a"- to the consonants, we receive the name YeHoVah.

In this format, the "e" (sh'va) stands for the future tense, the "o" (holom) for the present tense, and the "a" (patach) refers to the past tense. That gives meaning to the name YeHoVah as "He will be, He is, He was." In other words, the Eternal One. This meaning fits the understanding of the early patriarchs.

If one chooses the pronunciation, YaHWeH, there is no particular sense to the vowel pattern. For that reason I see YeHoVaH as preferable. Yet there is another reason grammatically. Hebrew vowels change form depending on the number of syllables, and on where the syllables are located in the name.

If there is just one syllable, such as Yah, then the "a" vowel is correct. Or if the letters come at the end of the word, such as Eliyah (Elijah), then the "a" is also correct. However, when the vowel comes at the beginning with multiple syllables, it changes. This can easily be proved by checking a concordance of the Bible.

Such names as Yehoyachin or Yehoshua or Yehoyada or Yehoshaphat contain the same root letters as YHVH, in the same syllable arrangement. All of the names in this pattern display the vowels as "e"-"o"-"a." If that same pattern is placed in the letters YHVH, we see the name again as Yehovah.

Since EVERY example of the YHVH root used in biblical names in this pattern shows the vowels as "e"-"o"-"a", one would have to show some other overwhelming evidence, textually or grammatically, to choose a different pronunciation. There is no such other overwhelming documentation weighty enough to refute the biblical and grammatical evidence.

In summary, 1) the meaning of the vowels, 2) the grammatical form, and 3) the list of biblical examples, all point to Yehovah (or Yehowah) as the preferred pronunciation over Yahweh.

Source: Revive Israel.org

** YeHoVaH (with these 3 vowels) appears over 50 times in the Leningrad Manuscript (the oldest copy of the Old testament in hebrew which is kept in a vault in Jerusalem.