John Tvedtnes writes that in comparing the Isaiah text from the King James Bible with the Book of Mormon, we find that while 2 Nephi 20:29 has the word "Ramath," the KJV (Isaiah 10:29) has "Ramah" and the Massoretic Hebrew Text has "Rmh. "Ramath" would be the more ancient form of the name, with the old feminine -ath suffix which, in later (even Biblical, usually) Hebrew disappeared in pausal form of the noun. It is interesting that in 2 Nephi 20:28 (compare Isaiah 10:28) both the KJV and the Book of Mormon have the name "Aiath" with the same old feminine ending. This is particularly interesting, because in the IQIsa (Qumran) manuscript the name is written as "Aiah" but a superscript letter is added to show the older form "Aiath" This provides evidence that the Brass Plates was from an older source than the Massoretic Hebrew Text. The oldest copies of the Massoretic Text date to the 8th century A.D. The Qumran text is dated to the first centuries B.C. [John A. Tvedtnes, "The Isaiah Variants in the Book of Mormon," FARMS, p. 50]
“Ramath”
The name Ramah (Heb. "to be high") was used of several places, all of them on elevated sites. Ramah of Benjamin, was near Bethel, in the area of Gibeon (Joshua 18:25) was a restingplace on the road north. When Asa of Judah and Baasha of Israel were at war, Baasha built a fort here, but when the Syrians attacked Israel Asa destroyed it and built Geba and Mizpah with the materials (1 Kings 15:17, 21-22; 2 Chronicles 16:1, 5-6). Here Nebuzaradan gathered the exiles after the fall of Jerusalem and released Jeremiah (Jeremiah 40:1).
Ramah (Ramath--2 Nephi 20:29) features in the messages of some of the prophets (Hosea 5:8; Isaiah 10:29; Jeremiah 31:15). It is probably to be identified with Er-Ram, 8 kilometers north of Jerusalem. [Tyndale House, The Illustrated Bible Dictionary, Vol. 3, p. 1318] [See the commentary on Ether 15:11]
2 Nephi 20:29 Ramath ([Illustration]): The Possible locations for biblical Ramah. [Tyndale House, The Illustrated Bible Dictionary, Vol. 3, p. 1318]