Nephilim 

Nephilim (or sometimes referred to as nefalim) are beings, who appear in the Hebrew Bible; specifically mentioned in the Book of Genesis and the Book of Numbers; they are also mentioned in other Biblical texts and in some non-canonical Jewish writings.

The etymology of the Hebrew word נְפִילִים (nephilim) means "fallen ones."^[1][2][3]

Abraham ibn Ezra proposes that they were called fallen ones because men's hearts would fail at the sight of them. Some suggest that they were giants and when they fell, the ground shook, causing others to fall too.^{[citation needed]} Jean Leclerc and Peter of Aquila among others suggest that it is derived from the warlike nature of the Nephilim, comparing the usage of Naphal in Job 1:15 "And the Sabeans fell upon them" where Naphal means "to take in battle". Alternatively, Shadal understands nephilim as deriving from the Hebrew word פלא Pele which means wondrous.^[4] Another possibility is that the term is a generic term for "giants" in general,^[5] which is consistent with the Septuagint and Vulgate translations of the word. Some expositors believe it may refer more to the ferocity and strength of the people who are referred to, rather than their physical height,^[6][7] though in the Book of Numbers intentional stress on height is apparent, whether metaphorical or actual (see below on Anakim).

Genesis Chapter 6, verses 1 through 4 mentions Nephilim:

Now it came about, when men began to multiply on the face of the land, and daughters were born to them, that the sons of God saw that the daughters of men were beautiful; and they took wives for themselves, whomever they chose. Then the LORD said, "My Spirit shall not strive with man forever, for he is indeed flesh; nevertheless his days shall be one hundred and twenty years." The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of men, and they bore children to them. Those were the mighty men who were of old, men of renown.

—^[8]

They are mentioned again in Numbers chapter 13, verses 32–33, in a description of the inhabitants of Hebron:

So they gave out to the sons of Israel a bad report of the land which they had spied out, saying, "The land through which we have gone, in spying it out, is a land that devours its inhabitants; and all the people whom we saw in it are men of great size. There also we saw the Nephilim (the sons of Anak are part of the Nephilim); and we became like grasshoppers in our own sight, and so we were in their sight.

—^[9]

There are four common views^{[citation needed]} regarding the identity of the Nephilim.

• They were the hybrid offspring of fallen angels and human women.
• They were the offspring of descendants of Seth with those of Cain.
• Webster's 1913 Dictionary defines the word simply as "Giant." Thus, any especially tall, powerful, large, or mighty man would be described in ancient times as Nephilim. Nephilim may simply mean "giant," champion, or strong man.
• They are not historical figures and are ancient imagery with questionable meaning.^[10]

This info copied from http://en.wikipedia.org/wiki/Nephilim on 05 April 2010.

Perhaps these beings mentioned in Genesis are the result of offspring produced by fallen divine beings, or the so-called Sons of God of the Holy Bible. See MPD_0009 for more info.