"the head," c. 1700, a slang or humorous variant of knob (q.v.).
nob (n.2)
"a member of the aristocracy, person of wealth and distinction," 1755, a slang shortening of nobleman or some similar word. Related: Nobby; nobbily.
Nixon
no
No.
no-account
Noah
nob
nobbut
Nobel
nobelium
nobility
nobis