“The correspondance between Enmeduranki, for a long time considered to be the Mesopotamian Enoch, with an apkallū named Utu-abzu, proved highly informative.
In 1974 Borger observed in an important article, that in tablet III of the omen series Bīt Mēseri (“House of Confinement”) a list of these apkallū is provided and that the apkallū Utu-abzu who is, as we have just seen, associated with the primeval ruler Enmeduranki is explicitly said to have “ascended to heaven.”
(“Beschwörung. U-anna, der die Pläne des Himmels und der Erde vollendet, U-anne-dugga, dem ein umfassender Verstand verliehen ist, Enmedugga, dem ein gutes Geschick beschieden ist, Enmegalamma, der in einem Hause geboren wurde, Enmebu-lugga, der auf einem Weidegrund aufwuchs, An-Enlilda, der Beschwörer der Stadt Eridu,” Utuabzu, der zum Himmel emporgestiegen ist, . . . ” (Borger, “Beschwörungsserie,” p. 192).
(“Summons. U -anna, completes the plans of the heavens and the earth, U-anne-dugga, accompanied by a comprehensive understanding, Enmedugga, who is granted good skill, Enmegalamma, who was born in a house, Enmebu-lugga, who grew up on a pasture, An-Enlilda, the Summoner of the city Eridu.”)
In Borger’s words we can therefore say: “The mythological conception of Enoch’s ascension to heaven derives . . . from Enmeduranki’s counselor, the seventh antediluvian sage, named Utuabzu!”
(Borger, “Incantation Series,” p. 232.)
The iconographic evidence for these apkallū is manifold and best known from various Assyrian reliefs. We usually refer to them as genii. Bīt Mēseri, however, describes them as purādu-fishes, and this coincides with iconographic research undertaken by Wiggerman some twenty years ago in his study on Mesopotamian Protective Spirits.
(F.A.M. Wiggermann, Mesopotamian Protective Spirits: The Ritual Texts (Cuneiform Monographs 1; Groningen: Styx, 1992).
Wiggerman could distinguish between basically three types of genii, attested in the Mesopotamian art: First, there is a human faced genius, second, a bird apkallū who occur only in “Assyrian” contexts, and third, a fish apkallū, the original Babylonian apkallū, as described by Berossos; according to the texts the last two groups of apkallū are coming in groups of seven.
The first type, the human faced genius must be kept apart because these genii are depicted wearing a horned crown which explicitly marks them as divine.
I cannot dwell here on the complicated issue of a possible intertextual relation between these apkallū and the “fallen angels” of the biblical tradition. Instead I will add some remarks concerning the following feature of the Enochic tradition, especially the Book of Giants.
1 Enoch 6:1-3 gives account of the siring of giants; men had multiplied and the watchers, the sons of heaven, saw their beautiful daughters and desired them.
Therefore, “they said to one another, ‘Come, let us choose for ourselves wives from the daughters of men, and let us beget children for ourselves.’
And Shemihazah, their chief, said to them, ‘I fear that you will not want to do this deed, and I alone shall be guilty of a great sin.’”
1 Enoch 7:1-2 describes that the women conceived from them and “bore to them great giants. And the giants begot Nephilim, and to the Nephilim were born . . . And they were growing in accordance with their greatness.”
Gebhard J. Selz, “Of Heroes and Sages–Considerations of the Early Mesopotamian Background of Some Enochic Traditions,” in Armin Lange, et al, The Dead Sea Scrolls in Context, v. 2, Brill, 2011, pp. 794-5.