Spelling mistakes are not always the fault of the writer. In e-mails and other typed communications (maybe here too?) the autocorrect can introduce mis-spellings if the mis-spelt version is very widely repeated. President Trump (in)famously referred to ‘Nambia’. Did he mean Namibia, or Zambia, we’ll never know. But his crass ignorance has been so widely mocked and lampooned that ‘Nambia’ has become a well used word. For a time at least, Namibia was liable to be auto-corrected to Nambia as a result.
Not a mis-spelling but of similar origin. My former colleague, Melanie, had her name autocorrected repeatedly to ‘Melania’ reflecting just how common Melania Trump was in media appearances.