Your own site, Wikidata, third-party mentions and business databases can expand your Knowledge Graph entries in Google and Bing.
Please visit Search Engine Land for the full article.
Search Engine Land: News & Info About SEO, PPC, SEM, Search Engines & Search Marketing https://searchengineland.com/how-to-get-a-knowledge-panel-for-your-brand-even-without-wikipedia-338642