I am looking for information on my grandfather's family who were in New York City, possibly Brooklyn, at least up until the 1950's. My grandfather's name was Joseph Jacobson. He married my grandmother, Celia Jacobson, and they lived in California where he died. His family stayed in New York as far as we know. He had three sisters--Florence, Hazel and Lena. All I know about them is that Florence had two sons named Morton and Everett, but I don't know her married name. Lena married a Henry Kaufman. Does this sound familiar to anyone?