The only sister of my grandmother, Rose Jacklowitz, whose decendants I do not totally know was named Bertha. If that is your grandmother, we are not so distant. However, I think this unlikely since my grandmother came to this country before 1900. Otherwise, the only thing I can imagine is that the Rose you are writing about was a grandmother of my grandmother.If that is the case, her husband would have been one of the founders of Zionism, and went by the official last name of Yankelovitch. Of course, if Jacklowitz was a married name, if she was married to a Morris Jacklowitz, you are a link I am hunting for. I know that his wife's name was Rose, and that she went by the nickname of Mulla Rosa.