According to historians, Octavius, later known as Augustus, is probably the biological father of Jesus [1]. But the birth stories in the Gospels of Matthew and Luke do not support this claim. In ancient times, the concept was understood differently than in modern times. According to the Aristotelian theory that prevailed at the time, the man's sperm was the life-creating principle, while the woman's menstrual blood was the fetus. Therefore, Jesus would be considered fully human by ancient standards because his mother provided all of his bodily substance [1]. The birth stories of Matthew and Luke state that Jesus was conceived without a human father, but later in the Gospel according to Luke, Joseph is mentioned as the parent and father of Jesus. Traditionally, it is believed that Joseph was the adoptive father of Jesus, but some experts argue that the Gospels have two conceptual stories about the same person, which allows giving meaning and value to people who have reached adulthood [1]. However, most Christians believe that Joseph was the real father of Jesus in every way except biologically, because he was the legal father who raised Jesus [3].