According to Knight, p36, Hapi the Nile God "his being was shrouded in mystery, and he seems to have been approached through Ptah or Khnemu, one of whom is styled "Lord of the fish" "Creator of wheat and barley" and the other is the "bringer of food"
and on p64 writing of Khnemu: "His earliest name was Qebh, and he was originally a river-god—the god of the First Cataract, par excellence. It was Khnemu, in fact, who kept the doors that held in the inundation, and who drew back the bolts at the proper time. In a quadruple ram-headed form his connection is shown with Ra, Shu, Seb, and Osiris"
"As the architect of the universe, he possessed seven forms, which are often alluded to in texts. They are sometimes represented in pictures, and their names are as follows:
Khnemu Nehep, ‘ Khnemu the Creator' Khnemu Khenti-tani, ‘Khnemu, governor of the two lands’; Khnemu Sekhet ashsep-f, ‘ Khnemu, weaver of his light'; Khnemu Khenti per-ankh,'Khnemu governor of the house of life'; Khnemu Neb-ta-Ankhtet, ‘ Khnemu, lord of the land of life ’; Khnemu Khenti netchemtchem ankhet,‘ Khnemu, governor of the house of sweet life'; Khnemu Neb, 'Khnemu, lord'"
It is clear that Khnum has a connection to the water god Hapi, indeed in his earliest forms taking on the function of Hapi. Hapi is connected to Aquarius by Lull and Belmonte in their discussion on the Zodiac of Dendera on p181.
Seb is connected to the Goose - sometimes called the "Great Cackler" - Knight p110 and on p143 Seb is described as the "bull of Nut".
Khnum also has connection to Seb also known as Geb, Keb the Earth god.
I note that the Goose and the Bull represent the animals that Djedi decapitates in the story. Similarly, Khnemu is represented by the ram - prior to decapitations, Djedi refuses to do so on a prisoner as it is not done on the "noble flock".
 Knight, A, "Amentet An Account of the Gods, Amulets and Scarabs of the Ancient Egyptians", Longman's, Green & Co, 1915
  Lull and Belmonte, The Constellations of Ancient Egypt, accessed from [www.iac.es]