"Personnel" - What does this evoke? Pea-green walls, worn tile, metal desks, and lots and lots of polyester.
"Human Resources" - Is this a strip mining operation? Are steam shovels involved?
"People Department" - Very New Agey. Let me see those tie-dyed business cards, bro.
"Human Capital" - Well, this certainly removes any warm and cuddly feelings. "Hey, you'd better put that Human Capital back in the safety deposit box."
My own choice would be simple: "Employee Recruitment and Development."