The ancestry of the Rothschilds can be traced back to 1577 to Izaak Elchanan Rothschild (Isaac (Isaak) Elchanan Bacharach, zum Hahn), whose name is derived from the German "zum rothen Schild" (with the old spelling "th"), meaning "with the red shield", in reference to the house where the family lived for many generations. (At the time, houses were designated by signs with different symbols or colors, not numbers.) The name Rothschild in the Yiddish language means Red Coat, in reference to a heraldic coat of arms. His grandchildren and descendants took this name as the family name and kept it when they relocated in 1664 to another house in the Judengasse—"" ("in the back of the saucepan")—which became the family's home and place of business through to the early 19th century.