TyCam

This plugin is extremely beneficial if you have more than one author on your blog but it?s also still good to have even if your blog only has one author. What it does is add in social media links to your Contact Info section in your user profile for popular social media sites such as Google Plus, Twitter and Facebook.
Once you fill in one or more of those fields, 16 x16 icons will appear next to your name when your name appears as the author of a blog post. This lets readers easily find your social media information as they read and is completely unique to each author.

Author Social Links

Adds 16x16 social media icon links next to the author's name, unique to each author.

Chris Allen

Poodle Plugins

This plugin will allow you to choose a custom URL for your author links, instead of the standard WordPress author page. 
This can be useful if you want to link to your own Twitter, LinkedIn or other social media profile.
There are two areas where this plugin can be configured:
Firstly, a global settings section is available under WordPress Settings. Second, under each users profile page.
A user can set their own custom URL on their profile page, and this will apply just to them. 
This can can be overriden by the global admin setting, if the ‘Override Individual Authors’ setting is checked.
Custom author URL’s also redirect author pages when directly accessed. 
For example if your user is called Bob, and you try to access https://yourblog.com/author/bob, it will redirect.

WP Custom Author URL

Set a custom URL for your author name link, on a global or author-specific basis. Also redirects all author pages.

Author Social Links vs WP Custom Author URL