The role doesn't originate in Robert Kirkman's comic books, but there is a character named Noah Cruz, who appeared in The Walking Dead prequel video game Survival Instinct. It hasn't been confirmed if Tyler James Williams is playing Noah Cruz or not, but the actor matches up with the video game character's age and ethnicity. The series featured another character named Noah, a Woodbury resident played by Parker Wierling in two Season 3 episodes. He was eventually killed during Woodbury's battle with Rick (Andrew Lincoln) and his group.
Tyler James Williams was https://www.facebook.com/SpoilingDeadFans/photos/a.221132834708529.1073741829.164502373704909/362693843885760/?type=1|spotted on the set last month, and there is speculation that he is the male who follows Beth (Emily Kinney) out of the hospital in a recent trailer. The actor also "fits the description" of an actor seen on the set during scenes with Andrew Lincoln, Steven Yeun, Danai Gurira and Chad Coleman.
Tyler James Williams is best known for playing the title character in Everybody Hates Chris, and he also starred on NBC's Go On. He will next be seen on the big screen in the indie comedy Dear White People.