The menorah is a seven-branched candelabra often seen on Jewish tombstones, especially those of women. The menorah is one of the oldest symbols of Judaism. Instructions for making a menorah are given in chapter 25 of Exodus. On older grave markers you may see menorahs with less than seven branches.
Photo: from the tombstone of Sam L. Meyer (1877-1961) and Ida L. Meyer (1883-1962), Emanuel at Fairmount Cemetery, Denver, Colorado