Katja is a common female name in several countries, including Germany, Russia, and Scandinavia. It is often considered a diminutive form of Katherine or Ekaterina. The name has various meanings, often associated with purity and clarity. In popular culture, Katja appears in literature, film, and music, representing diverse characters and themes. The name is also linked to notable figures, such as Katja Kipping, a German politician, and Katja Herbers, a Dutch actress known for her roles in television series.