Dear Stewart, there is in fact one source stating that the ending -ček does in fact mean "from Czech country" (http://www.oxfordjctgenealogy.com/oxfordnamesexplained.htm). I do not believe they are right.I am not at all an expert, but I think that it is just the diminutive suffix -ek which is also quite common in Poland. There are many names ending with -ček, one will remember Alexander Dubček.
About 1 0/00 of Czechs are called Souček=knot, this name is among the top 100. Germans would probably transcribe this as Sautschek or Sautschek. Czech people would pronounce the -ch more or less as we do here, with the unpleasant -ch as in Ach or Nacht. Best wishes Gernot To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html