Flemish, although the name first turned up in England. But the original bearers of the name Pitts were people from Flanders (in today's Belgium) who had emigrated to England and who were living in the Hampshire town of Pitt.
Ethnicity of surname amyx
It could be any ethnicity, actually.
Arpaio can be a Gentile or Jewish surname
Chinese
Turkish
jewish
daleb
Austrian
Dutch
German
irish
Egyptian