In the Hebrew Scriptures, which Jesus knew and used, the name of God was represented by its four consonants יהוה (JHVH), called the tetragrammaton.

Whenever they came across the tetragrammaton, JHVH, they studiously substituted the Hebrew words Adonayʹ, meaning Lord, and Elohím, which means God.

What survived, then, were the four consonants called the Tetragrammaton, which one dictionary defines as “the four Hebrew letters usu[ally] transliterated YHWH or JHVH that form a biblical proper name of God.”

It is easy to see how JHVH, with vowel points and vowel sounds added, becomes “Jehovah,” the form that is most familiar and widely accepted in English.

God’s name in the older Hebrew manuscripts is shown as יהוה (YHWH or JHVH), and Bible commentators often refer to these characters as the “Tetragrammaton,” meaning “four letters.”

A little research also leaves no doubt that JHVH (YHWH) is the NAME of the Supreme Being, as shown in the Hebrew Bible.

Your quotation from the Catholic Biblical Encyclopedia says Jehovah was the incorrect pronunciation given to the Hebrew tetragrammaton JHVH in the 14th century by Porchetus de Salvaticis (1303).

Moreover, it preserves, equally with other forms, the four letters of the tetragrammaton JHVH.”

That name, represented by four Hebrew letters called the Tetragrammaton and commonly transliterated YHWH (or JHVH), appeared on coins, on facades of houses, in many books and Bibles, and even in some Catholic and Protestant churches.

In ancient copies of the Hebrew Bible, the divine name is represented by four consonants that may be transliterated as YHWH or JHVH.

In Hebrew manuscripts of the Bible, his name appears some 7,000 times as four consonants that can be transliterated YHWH or JHVH, commonly pronounced Jehovah in English.​—Exodus 3:15; 6:3.

They are often called the Tetragrammaton (meaning, “four letters”) and are represented in English by YHWH or JHVH.

It is written in Hebrew with four consonants, usually transliterated YHWH or JHVH.

For example, modern translators appear to have an aversion to using an equivalent for the Hebrew Tetragrammaton, YHWH or JHVH.

God’s personal name in the form of the Tetragrammaton, the four-letter Hebrew word transliterated as JHVH or YHWH in English and translated as Jehovah or Yahweh, appears nearly 7,000 times in the Hebrew Scriptures.

These four Hebrew letters are the equivalent of our four English letters YHWH (some say YHVH or JHVH).

In the original Hebrew language of the Bible God’s name appears in Tetragrammaton form (יהוה); the Tetragrammaton being defined as: “The Hebrew word written JHVH (or JHWH, YHVH, YHWH), representing, without vowels, the ‘ineffable name’ of God, . . . commonly transliterated in English as ‘Jehovah.’”—The American College Dictionary, page 1252.

These four Hebrew letters are the equivalent of our four English letters YHWH (or YHVH or JHVH).

It is defined as “the four Hebrew letters usually transliterated YHWH or JHVH that form a biblical proper name of God.”

In English the letters for his name are JHVH or YHWH.

These four Hebrew letters are the equivalent of our four English letters YHWH (or JHVH).

The churches have presented God as a tyrant, but the Bible teaches that he is perfect love, that in Hebrew his name is JHVH, and commonly this name is pronounced Jehovah.

In the Hebrew Scriptures his name is represented by four consonants, JHVH.

In the ancient Hebrew Scriptures Jehovah’s name is represented by four letters called the “tetragrammaton,” for which the English characters are JHVH (or YHWH).