I would suggest, if any of your relatives perished in the Holocaust, that your family tree would be welcomed by Yad VaShem in Jerusalem, Israel. I have visited there over the past many years; they are intent on gathering all possible data on the Jews who lost their lives so tragically during the Nazis' heydays in Europe.
It's a beautiful place and you will find it a most appropriate site for your family's tragic data.
Henny Moëd Roth
JewishGen researcher #19122