I had thought that Saophis Comastes might be Zaphenath/Sekhemhet (Joseph), but not sure now, if it is the same as Khnum-Khufu (and/or if Souphis 2 is Khafre?).
There are 2 issues/questions:
who was Hwjfw(j)/Khufu?
who was Khnum?
Khufu seemingly may be Jacob/Yakov (seeming matches/evidence), though may not be (some seeming problems/difficulties) (neither can be ruled out). (The pairing of Djedef-re & Khufu of Seneb would seem to confirm Jacob and Joseph, and recalls Ephraim and Manasseh.)
Hnmw/Khnum/Khnemu/Num/Nub/Nu/Nun/Noh (creator?) considered candidates of mine from reasonable to absurd have included: Noah, Nimrod, Ham, Canaan, Cain, Anum/dAnu/Ilu, Nammu, Enoch, Nusku, Eshmun (8), Uan/Oannes??
Probably the true origin is to be found in Sumerian.
Khnum is also in the Djoser 7 years famine/drought account?