The old records of this name in Germany are variously Knauss or Knaus. In America, various branches of the family have used the following forms:
--Knause
--Knous
--Knouse
--Knouss
--Knows
--Kanous
--Kanouse
--Kenous
--Kenouse
--Canous
--Canouse

Several other possible permutations MAY include the following, but these are conjectural only, never proven:
--Naus
--Nauss
--Nause
--Nous
--Nouss
--Noss
--Canos