They never told Shay's last name in the books.
In the Uglies trilogy by Scott Westerfeld, Shay's last name is not revealed. She is known simply as Shay.
Tally's parents' names in the Uglies series are Az and Suzanna Youngblood. They are part of the Rusty society and play a significant role in Tally's upbringing and decisions throughout the series.
Christopher Shays's birth name is Christopher H. Shays.
Raymond's last name in the series is Reddington.
Arthur's last name is Read in the series "Arthur."
on his series its FRED but his real name is lucas his last name in the series is Figglehorn and his real last name is Cruikshank
Ever's last name is Bloom
Chiyo's last name has not been revealed in the series.
He doesn't have a last name on the series.
In the books his last name is Kim In the TV series his last name is Kingston
Finn's last name has not been mentioned in the series. I do not think he posesses a last name. But, if i were to guess, he would probably have the same last name as Jake does (if Jake even has a last name, but i highly doubt it, as his last name is not mentioned in the series either) because he grew up with him and his parents.
Jakob's last name in the Twilight series is Black.