The Nephilim, by definition, are the Giants born of 'The Watchers/Fallen Ones/Supreme Ones sexual activities with human (Adam) women BUT there are also sections of the Bible, namely Isaiah 13, that also refer to 'The Lord of Hosts' being the commander of an army of Giants 'from a land afar off, from the utmost foundation of heaven'. These, too, may be a 'type' of Nephilim and they also seem to inhabit another world somewhere in space (a land afar OFF, FROM THE UTMOST FOUNDATION OF HEAVEN)
There are references on those Mayan tiles they found that correlate with the end of Mayan calendar date that suggest either the return of the 'nine' Gods.....or a celebration celebrating the 'Nine' Gods. Given Archaeologists and Theologists, much like many of the translations of the Bible, if the raw interpretation doesn't fit in with their beliefs, or their understanding, then they make it fit in with what they know/believe.
These Nine Gods could also be the Nephilim, or they could even be The Supreme Ones, or maybe even the Ruler of All.
"Nephilim" (נְפִילִים) probably derives from the Semitic root npl (נָפַל), "to fall" which also includes "to cause to fall" and "to kill, to ruin". The Brown-Driver-Briggs Lexicon gives the meaning as "giants" Robert Baker Girdlestone argued the word comes from the Hiphil causative stem. Adam Clarke took it as passive, "fallen", "apostates". Ronald Hendel states that it is a passive form "ones who have fallen", equivalent grammatically to paqid "one who is appointed" (i.e. overseer), asir, "one who is bound", (i.e. prisoner) etc.
So it also suggests 'The fallen ones'.
edit on 22-11-2012 by LightAssassin because: Scientists use raw data, and generally publish conflicting info therefore cannot be categorised in the manner that I did