Comoros is a small nation made up of three islands off the southeast coast of Africa. Its capital city is Moroni.
Some critics have claimed that Joseph Smith created the Book of Mormon names Cumorah and Moroni by copying them from a map of the Comoros islands.
This claim, like many efforts to explain away the Book of Mormon, commits the logical fallacy of the Appeal to probability. This fallacy argues that because something is even remotely possible, it must be true.
Pointing out a possible relationship like Comoros = Cumorah and Moroni = Moroni is not sufficient.
When the facts are examined, even the possiblity of Joseph seeing Comoros and Moroni recedes; the idea becomes absurd.
There is no evidence that Joseph saw these maps, or any other, but if he had they would have provided little help.
Furthermore, it is unlikely that any source would have contained the name of "Moroni." That settlement did not become the capital city until 1876 (32 years after Joseph's death and 47 years after the publication of the Book of Mormon), when Sultan Sa'id Ali settled there. At that time it was only a small settlement. Even a century later, in 1958, its population was only 6500.
Conclusion
Advocacy of the Comoros/Moroni link seems an act of desperation. It has not been proved that Joseph saw the names, or that any source available to him linked them. Furthermore, latching on to two names in an obscure reference work does nothing to explain the incredible complexity and internal consistency of the Book of Mormon.
Trivia
In an episode of the TV game show Jeopardy, host Alex Trebek gave the answer, "Pronounced one way, it is the capitol of the Comoros Islands; pronounced another way, it is the name of the angel that appeared to Joseph Smith." (The question, of course, was "What is Moroni?")
Here is a map from 1829 with the spelling of the island. This is from the University of Texas. You'll see that it is called Comore.
http://www.lib.utexas.edu/maps/historical/africa_se_1829.jpg
I'm not sure where you got your source. Could you provide it please? I'll keep looking too.
Wikipedia has the name of the islands in french and arabic and it isn't called comora there...
http://en.wikipedia.org/wiki/Comoros
I found this:
Brookes Gazateer
1794 edition
Comora on p. 400, no mention of Moroni
1819 edition
Comora, no mention of Moroni
(I found it funny that in the same they spelled the Sahara with a Z.....Zahara)
1835 edition
Comoro on p. 214, no mention of Moroni
1843 edition
Comoro, no mention of Moroni
Edit:
Andy R. apparently you haven't read the most recent changes and findings on the DNA evidence.
http://mormontimes.com/DB_index.php?id=438
http://mormontimes.com/DB_index.php?id=1064
http://mormontimes.com/WC_education.php?id=1895
http://en.fairmormon.org/Book_of_Mormon_and_DNA_evidence