Etymology The name of Nassau County originated from an old name for Long Island, which was at one time named Nassau, after the Dutch family of King William III of England, the House of Nassau, itself named after the German town of Nassau. The county colors (orange and blue) are also the colors of the House of Orange-Nassau.
Etymology The name of Nassau County originated from an old name for Long Island, which was at one time named Nassau, after the Dutch family of King William III of England, the House of Nassau, itself named after the German town of Nassau. The county colors (orange and blue) are also the colors of the House of Orange-Na,ssau.