twitter is on updates under someone else's name

I never downloaded twitter or had any use for it. Software updates says I need to update witter and it's under someone elses name (?). Maybe I opened an email that installed twitter, but than where is Twitter on my MacBookPro?

I searched for twitter and found twitter icons that I deleted. There are no other listings for Twitter. I checked preferences in both the base and my own.

How can I get rid of the update for twitter that I do not have?