One makes the assumption that this comes from French, chef.
Indeed it does, which again stems from the Latin caput (head, leader).
Makes the title "head chef" a little bit comical.
It came from Latin 'caput' through French 'chef', according to this.
Could it translated to "the chef" (head cook of a kitchen)?
kokk = chef (from junior to assistant head chef)
kjøkkensjef = head chef (lit. kitchen boss)
I gather that "sjef" does not mean "chef" [de cuisine] but does it also mean "chief" [chief of police for example]?