Were X-rays produced before the discovery by Röntgen?

Were X-rays produced before their formal discovery by Röntgen? Analysis of unexpected findings by others shows that undoubtedly X-rays were produced before Röntgen. However, the latter is the real discoverer of the rays named by himself "X-rays" or Röntgen rays to honour his discovery so meaningful for the patients all over the world in the diagnosis and treatment of severe illnesses as cancer, and also used in some industrial applications.