By default, when you share the URL to Facebook, it'll show a thumbnail, title, description and author name.

To change author tag By Haintheme, you can use Yoast SEO plugin.

  1. The First thing you need to do is install and activate, the WordPress SEO by Yoast plugin. 
  2. Once activated, you need to go to SEO » Social and simply check Enable to Add OpenGraph meta data 


  3. Select Account tab then insert your Facebook URL


That’s all, WordPress SEO will now automatically insert Facebook author tag or published by tag when you publish an article.