His last name is Yanakakis.
Elis Sella's birth name is Elis Elieser Salutskij.
Clea Yanakakis, though I'm not sure of the spelling of the last name.
Elis Regina's birth name is Elis Regina Carvalho da Costa.
Jack's last name in the book "Wonder" is Will.
Eli's last name in The Compound is Yanakakis.
Ashlyn's last name in the book "Trance" by Linda Gerber is Abbott.
In the book "Peak" by Roland Smith, the protagonist's last name is Marcello.
She doesnt have a name in the book
The last name of Wayne in the book "Tangerine" is Galindo.
Garrett's last name in the book "Flipped" is Strongwater.
Mo and Meggie's last name in the book "Inkheart" is Folchart.
Penny's last name from Penny from Heaven, Falucci