This is
Compare (Mark 15:26); (Luke 23:38); (John 19:19).
These accounts supplement, but do not contradict one another. No one of the Evangelists quotes the entire inscription. All have "The King of the Jews." Luke adds to this the further words, "This is"; Matthew quotes the name, "Jesus"; whilst John gives the additional words "of Nazareth." The narratives combined give the entire inscription: "This is [Matthew, Luke] Jesus [Matthew, John] of Nazareth [John] the King of the Jews" [all].