Ernst Werner Von Siemens was a famous German inventor, entrepreneur, and industrialist of the 19th century. Over the years, many people have referred to him using a variety of synonyms. Some of the most common ones include Ernst Werner Siemens, Werner von Siemens, and simply Siemens. He was also known by his initials E.W., which were commonly used in the industrial world. While each of these terms may be used interchangeably, they all refer to the same person and represent the incredible contributions that he made to the fields of engineering, telecommunications, and energy.