Kudiess family is a Brazilian family of German descent, they migrated from Rio Grande do Sul to the states of Bahia and Piauí in the 1980s, where they became one the main farmer families in Matopiba (Maranhão, Tocantins, Piauí and Bahia), which is principally active in soy production...
You're right about Fahr: good genealogical research...
But, once again, let's stop here...
The point is all 3 brothers were born in Germany so basically they are Germans