My grandmother Dora Grünberg b. Danzig 11-Mar-1920 d. Perth 31-Jul-2016 came from Danzig to Australia when she was 16 and has very little knowledge of her families names or locations.
Where is the first place I can start searching, she knows her father came from Russia, and her mothers family was from Danzig.
Her parents are Moses Grünberg (also known as other varients) born 1893 (approx) in Russia and Gertrude Rosenbaum born 1894 (approx) in Danzig.
Moses had 6 brothers and 1 sister.
Gertrude had 3 brothers, Herman, Leo and Theodore and 3 sisters Ella, Meta and Paula.
Meta married a Mr Zielonka and had 2 children.
Theodore had 2 children.
I believe that some of these people went to America, but I don't know which ones.
And that's about all I had been able to find after a couple of years of research.
My Grandmother arrived in Australia in 1939. I did find the boat details on Trove a while ago but I've misplaced it at the moment.