By any chance, have you read the book of Enoch? Book of Enoch
Enoch 7:9 These are the names of their chiefs: Samyaza, who was their leader, Urakabarameel, Akibeel, Tamiel, Ramuel, Danel, Azkeel, Saraknyal, Asael, Armers, Batraal, Anane, Zavebe, Samsaveel, Ertael, Turel, Yomyael, Arazyal. These were the prefects of the two hundred angels, and the remainder were all with them. (6)
(6) The Aramaic texts preserve an earlier list of names of these Watchers: Semihazah; Artqoph; Ramtel; Kokabel; Ramel; Danieal; Zeqiel; Baraqel; Asael; Hermoni; Matarel; Ananel; Stawel; Samsiel; Sahriel; Tummiel; Turiel; Yomiel; Yhaddiel (Milik, p. 151).
Enoch 7:10 Then they took wives, each choosing for himself; whom they began to approach, and with whom they cohabited; teaching them sorcery, incantations, and the dividing of roots and trees.
Enoch 7:11 And the women conceiving brought forth giants, (7)
(7) The Greek texts vary considerably from the Ethiopic text here. One Greek manuscript adds to this section, "And they [the women] bore to them [the Watchers] three races–first, the great giants. The giants brought forth [some say "slew"] the Naphelim, and the Naphelim brought forth [or "slew"] the Elioud. And they existed, increasing in power according to their greatness." See the account in the Book of Jubilees.
Enoch 7:12 Whose stature was each three hundred cubits. These devoured all which
the labor of men produced;
until it became impossible to feed them;
Enoch 7:13 When they turned themselves against men, in order to devour them;
Enoch 7:14 And began to injure birds, beasts, reptiles, and fishes, to eat their flesh one after another, (8) and to drink their blood.
(8) Their flesh one after another.
Or, "one another’s flesh." R.H. Charles notes that this phrase may refer to the destruction of one class of giants by another (Charles, p. 65).
Enoch 7:15 Then the earth reproved the unrighteous. Enoch Chapter 8
Enoch 8:1 Moreover Azazyel taught men to make swords, knives, shields, breastplates, the fabrication of mirrors, and the workmanship of bracelets and ornaments, the use of paint, the beautifying of the eyebrows, the use of
stones of every valuable and select kind, and all sorts of dyes, so that the world became altered.
Enoch 8:2 Impiety increased; fornication multiplied; and they transgressed and corrupted all their ways.
Enoch 8:3 Amazarak taught all the sorcerers, and dividers of roots:
Enoch 8:4 Armers taught
the solution of sorcery;
Enoch 8:5 Barkayal taught
the observers of the stars, (9)
(9) Observers of the stars.
Astrologers (Charles, p. 67).
Enoch 8:6 Akibeel taught
Enoch 8:7 Tamiel taught astronomy;
Enoch 8:8 And Asaradel taught the motion of the moon,
Enoch 8:9 And men, being destroyed, cried out; and their voice reached to heaven. Enoch Chapter 9
Enoch 9:1 Then Michael and Gabriel, Raphael, Suryal, and Uriel, looked down from heaven, and saw the quantity of blood which was shed on earth, and all the iniquity which was done upon it, and said one to another, It is
the voice of their cries;
Enoch 9:2 The earth deprived of her children
has cried even to the gate of heaven.