The name is Polish in origin.
The last name Kosch is of German origin.
English origin
Westfall, is an English last name of Normand origin.
The ethnicity of the last name Plow is English. However, Plow is also reported to have a French origin as well.
The name "Raffanello" is likely Italian in origin.
The Piras surname is of Italian origin.
The last name Michota is of Slovak origin. It is a fairly common surname in Slovakia and is likely to have Slovak roots.
I know that your last name is from Italy. I know this because that is my last name.
The last name Lugay is of Filipino origin. It is a common surname in the Philippines.
Harris is Welsh in origin, a variation of the English name Harold.
The name Kuiper is most commonly dutch