Informa la Enciclopedia Británica:
Una explicación en español.

¿Qué dicen los protestantes? Noten que reconocen que no es nombre del texto original.
«Interestingly enough, the term «Jehovah» is less than 700 years old. Jehovah became increasingly used in early English translations. Tyndale, the Geneva Bible, and others used the term Jehovah occasionally to represent the Hebrew name YHWH. The term occurs only four times in the King James Version of the Bible (Exodus 6:3; Psalm 83:18; Isaiah 12:2; 26:4). A mixture of “Jehovah” and “Lord” remained consistent in most English translations. The English Revised Version of 1885, and the American Standard Version of 1901, choose “Jehovah” as its standard rendering of YHWH, a name it uses over 6,800 times. It is also used, and strongly promoted by Jehovah’s Witnesses.» (https://versebyverseministry.org/bible-answers/where-did-the-name-jehovah-come-from?locale=en)
Un texto en español donde los protestantes reconocen que el término Jehová en realidad es nuevo.

Hay hermanos separados que reconocen el punto.

