https://support.google.com/accounts/answer/40560?hl=en

If you're trying to sign in, but don't remember your username or aren't sure if you created an account, try recovering your username: ...

https://www.quora.com/How-do-you-check-the-availability-of-a-Gmail-username

Open your Browser and, Click this link here: Create your Google ... Note: In case your username is not available, so you have to choose ...

https://www.gmailavailability.com/

Gmail Availability Checker is a free tool to check if a Google Mail username is available. It instantly checks to let you know if a username is available as you type.

https://mashable.com/2012/06/04/gmail-address-custom/

Jun 4, 2012 ... So you want to sign up for Gmail (or change your username), but the Holy Grail of email addresses ... You can sync this to any Google account and use yourname @about.me as a Gmail address, assuming it's available.

https://www.huffpost.com/entry/gmail-domain-names_n_55b65314e4b0a13f9d191b84

Jul 27, 2015 ... But for those of us who weren't lucky enough to get the username of our choice, ... Google is testing a new service that will allow Gmail users to ... when the new service will be available or whether Gmail customers will be ...

http://www.spinxo.com/gmail-names

Use our username generator to combine various popular keywords with your name, words that are important to you or characterize you and your personality.

https://www.namecheckr.com/

Check domain & social username availability across multiple networks. Need Help? .com · facebook · twitter · tumblr · reddit · slack · instagram .net · myspace.

https://www.ft.com/content/d7985578-bdb8-11e5-846f-79b0e3d20eaf

Jan 19, 2016 ... Google, after all, does not free usernames that have been taken ... Yahoo explains that this is “due to the limited number of names available”.

https://webapps.stackexchange.com/questions/95200/no-more-username-available-in-gmail

Do you know if after a period of non-use usernames return available for Gmail? No, they do not. And some Google services (e.g., Blogger) have ...

https://www.labnol.org/internet/check-email-address-exists/28453/

Mar 14, 2014 ... I have tested this with Google Apps, Yahoo Mail and Outlook ... valid email address, the error would say Someone already has that username.