In the Printer's Manuscript we find the name "Ammonidah" in a number of places. This was corrected to "Ammonihah" before the script was submitted for publication. [FARMS Staff, Book of Mormon Critical Text, 1987, vol. 2, critical apparatus for chapter 9]
“A City Which Was Called Ammonihah”
Alma traveled a "three days' journey on the north of the land of Melek" and came to "a city which was called Ammonihah" (Alma 8:6). His travel route would have probably taken him along the eastern side of a western wilderness (mountains?) for a distance of between 30-60 miles. [Alan C. Miner, Personal Notes] [See the commentary on Alma 22:27-29]