Twitter's original name was Twttr. It was changed to Twitter in 2006.
Twttr was created in March 2006 by Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams. The name was changed to Twitter in July 2006 to make it easier for users to remember. Twitter was initially launched as a text-based messaging service, and has since evolved to include photos, videos, and other multimedia content.