
The indispensable (and prolific) Robert Boylan addresses an anti-Mormon argument that has been around for many, many generations:
http://scripturalmormonism.blogspot.com/2016/09/the-meaning-of-mormon-responding-to.html
Incidentally, the notion of Joseph Smith (or one of his invisible co-conspirators) consulting a Greek lexicon and finding the Greek synonym for bugbear — a kind of bogeyman or hobgoblin — in order to come up with the name Mormon strikes me as ineffably absurd. Just for the record.