You may recall that the Bible was written in three languages: Hebrew, Aramaic and Greek. It's obvious why it was written in Hebrew. The Aramaic writings came due to the captivity in Babylon, and later Israel and the known world were conquered by Alexander the Great of the Greeks. Hundreds of years elapsed (during the time of the Macabbees) and eventually the Jews spoke Greek.

The Greek name for the Son of God is Jesus Christ. But the Hebrew equivalent is Joshua (pronounced Yeshua) Messiah AKA Anointed Messiah. Meaning that the Book of Joshua (son of Nun) in the Greek would have been called Jesus Nun, which is something Eusebius commented on matter of factly in his writings.

Part 1 of the Eusebius' Ecclesiastical History -> https://www.thebookmatrix.com/p/transcript-eusebius-ecclesiastical.html
Part 11 of the Eusebius' Ecclesiastical History -> https://www.thebookmatrix.com/p/transcript-ecclesiastical-history-of.html