Thanks for the reply, Paul is my cousin and we grew up together in Canberra. There are only My father, Pauls' and my grandmother, Paul, My younger sister and I and between us 6 of our children that carry the surname, that we are aware of in the world.
Trying to locate any Knupkis that may have gone from Latvia to the USA in the 1930's and any time there after still.
I am aware of one lady named Renate Knupkis who passsed away in mid 1990's I believe her to have been our grandfathers first wife.
There were also an uncle and cousin of Pauls father and my father who left Latvia around WWII or shortly after that were also Knupkis, but last known links to them and any family they may have had lead to either Siberia and the USA.
Hopfully some of this info might trigger a memory in someone who reads this apart from you :)
I really do appreciate the response, if you see Paul please send my love.