Theophilus is the name or honorary title of the person to whom the Gospel of Luke and the Acts of the Apostles are addressed (Luke 1:3, Acts 1:1). It is unanimously agreed that both Luke and Acts were written by the same author, and sometimes argued that the two books were originally a single unified work. It is also agreed that both Luke and Acts were originally written in a refined Koine Greek, and that "θεόφιλος" ("Theophilos"), as it appears therein, means friend of God or (be)loved by God or loving God in the Greek language. No one knows the true identity of Theophilus and there are several conjectures and traditions around an identity. In English Theophilus is also written "Theophilos", both a common name and an honorary title among the learned (academic) Romans and Jews of the era. Their life would coincide with the writing of Luke and the author of Acts.