Question: Who are the Nephilim and how did they come to be?
I have received this question many times. In the Orthodox tradition there is no definitive answer on it. Many people claim this is simply a “mystery.” However, there is an article by Fr. Stephen de Young called “Here There Be Giants.” I found it to be both fascinating and better, in terms of explaining various passages, than other articles on the subject.
The comments and responses below Fr. Stephen’s article also offer some good information (in my opinion).