The link between Cumorah and Moroni is that Moroni was present at the final battle between the Nephites and Lamanites that occurred at this hill. Secondly, many Latter-day Saints took to calling the hill where Moroni hid the golden plates that he later delivered to Joseph Smith by the name Cumorah. There is, however, not any evidence that the two hill are the same hill. There are those that would try to claim that Joseph Smith got these names from a source other than the Book of Mormon. However, those that would make this connection must ignore certain facts about language. First of all, there are only a limited number of sounds that the human vocal apparatus is capable of making. Therefore, all languages are going to have at least some sounds that are the same. Second, because there is a limited number of sounds available, there are going to be a limited number of ways to put those sounds together to create words. So, it is not going to be uncommon for very different languages to occasionally have words that sound the same. Let's look at a few examples of this. First of all, let's look at the word that is pronounced "see". In Spanish, it is spelt "si" and in Italian it is spelt "ci". In both of these languages it means "yes". In english it is spelt either "see" or "sea" and I trust that we all know what these two words mean. Next, Let's look at a name that is common in both English and the Orient. It is pronounce "Lee". In English, it is spelt "Lee". When the Oriental name is translated into English spellings, it is spelt either "Lee" or "Li". Two very common names from opposite ends of the Eurasian continent and two very different languages. Who here is going to try to argue that one group stole the name from the other? These are just two examples. I really only know English. So, if I can come up with these two, then I am sure that those of you who are familiar with multiple languages can come up with many more if you think about it. Finally, one has to ask how likely it is that Joseph Smith would have heard of the places that bore the similar sounding names. Joseph Smith's education to the point in time of his translating the Book of Mormon had been very spotty at best. It had constantly been interrupted by the need for him to help the family earn a living. As a result of this he had not gotten past the third grade. Additionally, he had spent his entire life living on what was at the various times basically the fronteer. Now, I have had many times the education that he had had, having gone all the way through a Master's degree. I had not heard of the two rather insignificant places that another answer mentioned until I read that answer. How many of you had either? How likely is it that Joseph Smith would have heard of it? Oh and one other thing about this. Look at the map in the link in the other answer. Notice that while it does show the island in question, it does not give the name of the capital city. So, ASSUMING that Joseph Smith had seen the map that they offer as proof, how would he have know the name of the capital city? The whole argument is full of holes. No, Joseph Smith did not borrow the names from another source. Despite the attempt to make a connection, all the critics have to go on is the similarity in the sounds of the name. They offer no evidence to support the contention that Joseph Smith had ever heard of those islands, let a lone prior to his translating the Book of Mormon. So, what we have here is the attempt to blow a coincidence up into something more than it is.