Facebook usernames were launched by Facebook in June 2009 and whilst everyone that uses Facebook has a Facebook enabled email address and password associated with their Facebook account not everyone has a Facebook username.
Ang Facebook username ay inilunsad ng Facebook sa Hunyo 2009 at habang ang lahat na gumagamit ng Facebook ay may isang pinaganang email address sa Facebook at password na kaugnay sa kanilang Facebook account hindi lahat ay may Facebook username.