Seeking Jewish family ancestry from Poland. c. 1886 > Joseph Greenberg /Grynberg /Gruenberg? was born 01/01/1887 - died in October of 1952 in San Francisco, California. Family name may have been changed?
Family said to have lived in/or near Warsaw.
Joseph came to the US before WW2 and lost touch with family in Poland.
He married in the US --Mitzi / Mary John ( Catholic) from Czechoslovakia .
His Granddaughter Kathy is seeking to find what happened to Joseph's family.
We have no names of his parents.
A sister is said to have accompanied him to the US but no name is known for her.
It's thought they probably perished in the Holocaust.
I have looked at Yad Vashem but not knowing names doesn't help !
Thanks for any help anyone may have.