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.
Sumerian symbols of İnanna and Venus became King Solomons Seal thousands years later if Solomon ever existed. Etruscan texts tell that Solomon is a generic name for Patriarch Abraham . That's only your opinion, for Solomon was a real king as per bible.