The Star of David, known in Hebrew as the Shield of David or Magen David, is a generally recognized symbol of modern Jewish identity and Judaism. During the century the symbol became common in Jewish communities of Eastern Europe.
Very old Star of David on the Inner Wall of Jerusalem: Old City. The identification of the term "Star of David" or "Shield of David" with the hexagram shape dates to the 17th century. The term "Shield of David" is also used in the Siddur (Jewish prayer book) as a title of the God of Israel.
OK we have all the elements, fire, air, water and earth.I am and you are one of the other 6 pointed stars? 18 you would think perhaps because it's the brightest, but maybe 19 because it fits best with 11 in it's size?