Genealogy / The surname Kupaj ... [3]

Hi there
I am the granddaughter of polish immigrants to australia. i was also adopted, so i know very little about my polish roots ...

I was told there were 500 or so people in poland with the surname kupaj (is it pronounced like COO- pie?) and that they were mostly concentrated around the west-central province of Kalisz?

Any info you guys could share would be greatly appreciated.

I was also told that the name derived from "pile" or "heap", which kid of sounds like it was originally derogatory??

Thanks in advance