This wasn’t mentioned in the corporate contacts guidelines. Also, since Schema plugin follows Google’s guidelines and there is no much details on how to control what shows in the knowledge panel, I won’t making this part of the core plugin (at least not at this point).
However, the good news is you still can add extra details to the JSON-LD output by extending the Schema plugin output, here is a function that you may want to use (link to gist for this code):
add_action('schema_wp_knowledge_graph_json', 'schema_wp_knowledge_graph_json_123456');
/**
* Extend Schema Knowledge Graph JSON-LD output
*
* @return schema json-ld array
*/
function schema_wp_knowledge_graph_json_123456( $schema ) {
$schema['founder'] = "Founder Name"; // This can be a Person or Organization
return $schema;
}
P.S. Replace “Founder Name” with the Founder’s actual name.
Note: Per to schema.org recommendations, the “founder” property can be a Person or Organization.
You can add this code to your Theme’s functions.php file, or maybe in a form of a plugin.
I hope this helps.