I must amend my last email to you. Today, I looked at the 1900 US census for Eaton and Liberty Townships in Manitowoc County and the spelling was as you had it, "Kautzer". There was also a Kautza in Eaton Township but they listed Norway as their place of origin. Apparently Fr.Osswald at St.Nazianz prefered to spell it one way, the census taker another. I won't guess how the various branches of this prefered it until I have further information.