WP detectors will not be able to detect which theme your website are using. And your theme will not be renamed. The plugin will just hide its name.
“Hide your theme name” plugin is the WordPress plugin which helps you to hide your active theme name from all WP Detector websites. And you can do this without any knowledge about Apache, PHP, WordPress Codex, MySQL etc… Everything is simple. Install -> Open Settings page -> One single click -> See the result and check it in WP detector websites.