It is important to understand the meaning of terms used in the Bible. The word son is used many times in the Bible both in the Old Testament and the New Testament. The Greek word uiJovß is used 348 times in the New Testament and is translated in reference to Jesus' lineage (son of David), to Jesus be the Son of Man, to Jesus being the Son of God, to Jesus being the only begotten Son of God, to children, to children of Israel, to sons of men, etc. etc. etc.
Keep in mind that there is a difference in understanding of being sons of God relating to created beings, and being the Son of God, God himself in the flesh. God did not appear in the flesh nor was he incarnated anywhere else in history except when Jesus was born.
The Greek word Cristovß is used 530 times in the New Testament and refers to Jesus as being the only Appointed, Messiah, Christ. NO OTHER is referred to as being the CHRIST.
The Greek word monogenhvß (begotten)is used 9 times in the New Testament. It refers to a child being the ONLY child of an individual 4 times in Luke 7:12, Luke 8:42, Luke 38, and Hebrews 11:17. The Greek word monogenhvß refers to the ONLY child of God 5 times in John 1:14, John 1:18, John 3:16, John 3:18, and 1 John 4:9.