Isimud (cuneiform: dPAP.SIG7.NUN(.ME), dPAP.SIG7.NUN.ME.EZEN✕KASKAL; glossed i-si-mu in An = Anum) was the sukkal (divine “attendant”) of the god Enki (Ea).

[2] Wilfred G. Lambert has noted that the latter resembles the adjective usumia, “two-faced”, which was used in omen texts, and on this basis concluded that the theonym was understood similarly, presumably through a folk etymology.

[4] However, according to Julia Krul, based on Old Babylonian texts written in the Emesal dialect it can be now concluded that this name originally designated a female deity, who later came to be conflated with Isimud, possibly due to the influence of similar developments pertaining to Ninshubur.

[5] While most sukkals can only be identified in art because of their badge of office, a staff, Isimud on the account of his two faces is an exception, and it has been noted that he does not always hold this attribute.

[1] He speculates that since no references to a separate sanctuary dedicated to him have been identified, he might have been worshiped in the Eanna complex like many other minor deities.

[12] It was likely located near the main gate, but as there is no agreement which of the entrances fulfilled this role, two separate rooms discovered during excavations have been identified as Isimud’s dwelling, 48 and 79b (the latter alternatively assumed to be the cella of Kusu).

[5] He is mentioned in a text describing a procession taking place on the fourth day of the month Kislīmu, which involved a slave riding on the back of a bull.

[26] Further myths he plays a role in include Enki’s Journey to Nippur,[27] Ninurta and the Turtle,[28] Enūma Eliš, and Atraḫasīs, where he is tasked with informing the eponymous protagonist about the fate which will befall the world.

[29] While similar to the so-called "debate poems" such as Sheep and Grain, it is instead presumed to be a fable, though the full restoration of the plot is not impossible.