In Stephen King’s novel The Institute, the protagonist Luke’s surname is Ellis.
Luke Ellis is a highly intelligent twelve-year-old boy who is abducted from his home and taken to the Institute. There, children with telekinetic or telepathic abilities are confined and subjected to experiments intended to exploit their powers.
The Institute was published in 2019. Luke’s intelligence is important to the plot because he is not only gifted in the supernatural sense; he is also an unusually capable problem-solver who begins to understand the institution’s systems and search for a way out.
A common mix-up is to identify Luke by another child’s name, especially Tim Jamieson, the former police officer whose storyline eventually intersects with Luke’s. Tim is an important adult character, but Luke’s surname is Ellis.