The name Watcher, or Grigori, means "Those Who Watch", or "Those Who Are Awake",
or "The Ones Who Never Sleep".
1 And Uriel said to me: 'Here shall stand the angels who have connected themselves with women, and their spirits assuming many different forms are defiling mankind and shall lead them astray into sacrificing to demons as gods, (here shall they stand,) till the day of the great judgement in 2 which they shall be judged till they are made an end of.
(Enoch 19: 1,2)
In the Book Of Enoch, it describes that God had sent a legion of angels to earth in order to watch over and assist man during the beginning of civilization. These angels taught man sciences which were forbidden by God such as the magic in herbs, reading the stars, divination and sorcery. Enoch goes on to say:
"...but they chose husbands and wives from among the humans and led greatly debauched lives, neglecting their heavenly duties..."
This angered God greatly and he banished the "fallen".
Sadly these angels were not suited to this job and instead of playing a positive role they began to teach man sciences that God had deemed to be forbidden.
These subjects included astrology, divination, herb craft and magic.
To compound this, they also began to lust after some of the women they were supposed to be guiding. In order to cohabitate with these women they even assumed physical forms. Although the church might argue that angels have no gender and therefore are unable to procreate anyway, the following excerpt from Genesis 6:4, points out that "the sons of God went to the daughters of men and had children by them". The resulting half-breeds were named as the Nephilim.
In the writings of Enoch 1, there seems to be about 200 that fell ( a very small number I would say), naming about 19 (spelling variations observed) and listing the most prominent among them.
In the Book of Enoch is mentioned that a group of angels lusted after mortal women. sin.
There is a very brief excerpt about this group in Genesis 6:2-4 --"That the sons of God saw the daughters of men, that they were beautiful; and they took wives for themselves of all whom they chose".
Quoted by Jude, vss. 14, 15. And Enoch also, the seventh from Adam, prophesied of these, saying, Behold, the Lord cometh with ten thousands of his saints, Jude 14
To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard speeches which ungodly sinners have spoken against him. Jude 15
the sons of God (all males, no daughters of God) is the name for the fallen angels who saw women and saw they were beautiful. They left heaven to mate with them and take them as wives (as many as they pleased). The offspring were giants (goliath among others)
To understand the story better you should go to the link below (ill post some of it). The book of enoch focuses mainly on the fallen angels which are called "the watchers" (designated by God to watch over the earth)
very interesting story
http://www.biblefacts.org/bible/demon.html
The old story is as follows:
Enoch 7 And it came to pass when the children of men had multiplied that in those days were born unto them beautiful and comely daughters. And the angels, the children of the heaven, saw and lusted after them, and said to one another: ‘Come, let us choose us wives from among the children of men and beget us children.’ And Samyaza, who was their leader, said unto them: ‘I fear you will not indeed agree to do this deed, and I alone shall have to pay the penalty of a great sin.’ And they all answered him and said: ‘Let us all swear an oath, and all bind ourselves by mutual imprecations not to abandon this plan but to do this thing.’ Then they all swore together and bound themselves by mutual imprecations upon it. And they were two hundred in all; who descended in the days of Jared (between 3541 BC and 3379BC) on the summit of Mount Hermon, and they called it Mount Hermon, because they had sworn and bound themselves by mutual imprecations upon it. And these are the names of their leaders: Samlazaz, their leader, Araklba, Rameel, Kokablel, Tamlel, Ramlel, Danel, Ezeqeel, Baraqijal, Asael, Armaros, Batarel, Ananel, Zaq1el, Samsapeel, Satarel, Turel, Jomjael, Sariel. These are their chiefs of tens. And all the others together with them took unto themselves wives, and each chose for himself one, and they began to go in unto them and to defile themselves with them, and they taught them charms and enchantments, and the cutting of roots, and made them acquainted with plants. And they became pregnant, and they bare great giants, whose height was three thousand ells (should be approximately 13 ft.): Who consumed all the acquisitions of men. And when men could no longer sustain them, the giants turned against them and devoured mankind. And they began to sin against birds, and beasts, and reptiles, and fish, and to devour one another’s flesh, and drink the blood. Then the earth laid accusation against the lawless ones.
Enoch 8 And Azazel taught men to make swords, and knives, and shields, and breastplates, and made known to them the metals of the earth and the art of working them, and bracelets, and ornaments, and the use of antimony, and the beautifying of the eyelids, and all kinds of costly stones, and all coloring tinctures. And there arose much godlessness, and they committed fornication, and they were led astray, and became corrupt in all their ways. Samyaza taught enchantments (sorcery), and root-cuttings, ‘Armaros the resolving of enchantments, Baraqijal (taught) astrology, Kokabel the constellations, Ezeqeel the knowledge of the clouds, Araqiel the signs of the earth, Shamsiel the signs of the sun, and Sariel the course of the moon. And as men perished, they cried, and their cry went up to heaven.
Enoch 9 And then Michael, Uriel, Raphael, and Gabriel looked down from heaven and saw much blood being shed upon the earth, and all lawlessness being wrought upon the earth. And they said to the Lord of the ages: "You see what Azazel has done, who has taught all unrighteousness on earth and revealed the eternal secrets which were (preserved) in heaven, which men were striving to learn: And Samyaza has taught sorcery, to whom You have given authority to bear rule over his associates. And they have gone to the daughters of men upon the earth, and have slept with the women, and have defiled themselves, and revealed to them all kinds of sins. And the women have borne giants, and the whole earth has thereby been filled with blood and unrighteousness. And now, behold, the souls of those who have died are crying and making their suit to the gates of heaven, and their lamentations have ascended: and cannot cease because of the lawless deeds which are wrought on the earth. And You know all things before they come to pass, and You see these things and You do suffer them, and You do not say to us what we are to do to them in regard to these."
Enoch 10 Then said the Most High and sent Uriel to the son of Lamech, and said to him: ‘Go to Noah and tell him in my name "Hide thyself!" and reveal to him the end that is approaching: that the whole earth will be destroyed, and a deluge is about to come upon the whole earth, and will destroy all that is on it. And now instruct him that he may escape and his seed may be preserved for all the generations of the world.
Enoch 15 Why have you left the high, holy, and eternal heaven, and lain with women, and defiled yourselves with the daughters of men and taken to yourselves wives, and done like the children of earth, and begotten giants (as your) sons? And though you were holy, spiritual, living the eternal life, you have defiled yourselves with the blood of women, and have begotten (children) with the blood of flesh, and, as the children of men, have lusted after flesh and blood as those also do who die and perish. Therefore have I given them wives also that they might impregnate them, and beget children by them, that thus nothing might be wanting to them on earth. But you, from the beginning were spiritual, living the eternal life, and immortal for all generations of the world. And therefore I have not appointed wives for you; for as for the spiritual ones of the heaven, in heaven is their dwelling.
The story can also be found in the books of Jasher, Jubilees, and the recently-found Dead Sea Scroll, the Book of Giants. Angels have bodies. They can take a variety of forms, as well ("for Satan can appear even as an angel of light," etc.). There were two angelic rebellions, the first being the Luciferian rebellion that most are familiar with; this is the source of what Paul calls, in the sixth chapter of Ephesians, "Spirit wickedness in high places." This is why Jesus calls Satan "the prince of the powers of the air."
UFO researchers, take notice. The second rebellion came much, much later, and is well known in Hebrew esoteric tradition. In fact, much of this knowledge is still intact in the Hebrew tradition. Many books which were originally in the Bible--the books of Enoch, Jasher, Jubilees, and so on--contain the whole story of the fallen angels who rebelled in order to mate with human women. These beings were called the NEPHILIM, literally "those who came/fell down."
A recent dead-sea scroll find and translation, "the Book of Giants," also contains this story in great detail. Before you question the validity of the non-canonical books I mention, keep in mind that not only were they part of the original Old Testament, but many of them--particularly Enoch--were quoted from by the Apostles in the New Testament. Quotes from the book of Enoch can found in the books of Jude, Revelation, and several other places.
Enoch knew when the judgment would come. He named his son Methuselah. The meaning of the name Methuselah is "when he is dead it will come". The year Methuselah died is also the year of the great flood.