Father born in Wieruszow - Amrozynska, Knop

My paternal grandmother was Józefa Amroźynska is this a polish name she married Franciszek Knop

yes it is - though it should be spelled as Amrożyńska (perhaps Ambrożyńska but not necessarily)

Knop was probably originally derived from German "Knopf" (button, knob, pommel of a sword, etc.) The original Knopf may have been a button-maker or seller or hailed from some such locality as Knopfendorf, Knopfenwald, Knopfenfeld, etc.

Jo-Anne

Knop or Knoop is a German name. Members of that family were farmers who mainly settled in the Posen/Poznan area, AFAIK.

houseofnames.com/xq/asp.fc/qx/knoop-family-crest.htm

Also a Jewish name.

Most Every name, from Margolis, Szapiro, Blumental, Lubartower, Gryn, Wajs, Apfel, Szwarc, Rosenzweig, Birnbaum or Birnbojm (Yiddish) to Nowak, Kowalski, Lewandowski, Wójcik, Zieliński, Szymański and Antonowicz can be a Jewish name.