Your requirement for an unnecessary linear myopia is misleading you to the wrong conclusion. Jesus IS both found through the Old Testament and named in the Old Testament.
In English the name Jesus is a transliteration of the Latin form Iesus, which represents the Greek form already discussed of the Hebrew name yesua which is a late form of yosua itself a contracted form of Yehoshua (e.g. Yahweh is salvation).
In German, our English word for book is "buch." In Spanish, it becomes a "libro;" in French, a "livre." The language changes, but the object itself does not.
In the same way, we can refer to Jesus as “Jesus,” “Yeshua,” or “YehSou” (Cantonese), without changing His nature. In any language, His name means “the Lord is Salvation.”
This was the name of Moses’ successor, Joshua, son of Nun. Both because of the fame of this early hero of Israel and because of the meaning of the name, many men both in the Old Testament and in the New Testament bore the name of Joshua or Jesus. So also the New Testament, in referring to Joshua, son of Nun, calls him Jesus (Acts 7.45; Heb 4.8).
Joseph is told by the angel of the Lord to name the child born of Mary’s virginal conception "Jesus, for he shall save his people from their sins."
When God rescued men from sin and death, He was often called savior in the Old Testament; so, too, were the divinely commissioned men through whom He worked. Jesus’ name appears all throughout the Hebrew Scriptures, first as a name or title describing Yahweh’s role as Savior as well as the name of a high priest who was a sign of the Messiah to come.
In Psalm 110, Yahweh has the Son Jesus in mind as both Acts and Hebrews confirm. Jesus is given reign over God's heritage. Furthermore, he is appointed a high priest, not after the order of Aaron but after the order of Melchizedek. The combination of the kingly and priestly roles in Jesus is very significant for the role Jesus plays in God's plan for human salvation/deliverance. Also Acts 2:34-35, Joel 2:28-32, Acts 2:14-21, and Mal 3:1.
Yahweh’s purpose is the primary thrust of the Hebrew Scriptures. The creation narrative shows why God felt it necessary to reveal himself in history. The various stories developed in the opening chapters of Genesis demonstrate the condition of mankind. The call of Abram reveals how God chose one man through whom he would eventually fulfill his redeeming work through Jesus Christ.
The angel who spoke to Mary and the angel who spoke to Joseph in his dream communicated in Hebrew and they were not slow to grasp the meaning and significance of the name and its relation to His character and work of salvation also opening up the Hebrew Scriptures's meaning. Deliberately does nomina sacra only appear for the four terms “Jesus,” “Lord,” “Christ,” and “God" indicating from the earliest documented history of Christianity that the name of Jesus was held in the same manner as the Tetragrammaton which is to say it was held in the highest reverence.
Etc... etc... etc...
This One who is called wonderful in Isaiah, who is called Yahweh Himself, never got the name Yehoshua, but He still was Yehoshua because He has always been salvation from the beginning to the end. “Look unto Me,” this Messiah says in Isaiah, “all the ends of the earth and be saved. For there is no other God besides Me. There is no other Savior.” Jesus has always been Yahweh-is-salvation before the Old Testament, in the Old Testament, in the New Testament, and presently in spiritual dimensions beyond yet able to interact with us and the universe.
I do not find, in my Strong's, where it says it is the transliteration of a hebrew term. Jesus is not named in the old testament. He did not have a name then. No more so than God Himself. We are to call Him the great I am that I am. We don't know His actual name either. Jesus Christ was not called that until His physical birth in the flesh. This is not a big deal. I simply pointed out that He is not literally named in the old testament, and that is true.