When you are having your logo designed for personal, professional or business usage, always be sure to confirm whether or not the graphic designer used ‘stock or free images’ in the overall design.
At the end of the day, you want to ensure all the visual components in the design are originals. You do not want to be infringing on anyone’s ‘intellectual property (IP)’.
Original designs can be done through sketching and inking to digital reproduction as the end result using Adobe® Illustrator®.
For more on intellectual property, see link – http://www.wipo.int/about-ip/en/