... must be the HOLY SCRIPTURES.
That title and identity and concept is simply NOT IN SCRIPTURE.
It is NOT in Scripture even in regards to Joseph, the son of Jacob. It is not in Scripture in regards to Ephraim, the son of Joseph, the son of Jacob. It is an identity conjured up from the minds of men and made into a confusing doctrine , for those who entertain it.
That title and / or identity is not in the Hebrew, the Latin, The Greek Septuagint, the English.... nor the Aramaic Scriptures.
This is the final word:
It is not there.
Then, where can it be found? In the figment of the imagination of the detractors of Y'SHUA+ HaMASHIYACH.
Wise men still seek HIM+ ...Messiah, Son of David (Dawid).
A warning: stay away from such confusion. The penalty for bringing confusion into the camp was severe, in Torah.
+ + +