| Masoretic Text | LXX |
| 46:20 To Joseph in the land of Egypt were born Manasseh and Ephraim, whom Asenath daughter of Potiphera, priest of On, bore to him. (NRSV) | 46:20 To Joseph in the land of Egypt were born sons, Manasseh and Ephraim, whom Asenath daughter of Potiphera, priest of Heliopolis (=On), bore to him. And to Manasseh were born sons, whom the Syrian concubine bore him, Machir. And Machir became the father of Gilead. And the sons of Manasseh’s brother Ephraim, the brother of Manasseh: Sutalaam and Taam. And the sons of Sutalaam: Edem
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The lists in Gen 46 and Num 26 (MT and LXX) are connected, since both contain similar names in virtually the same order (although the Numbers text continues into later generations)
The overall similarity suggests that the five additional names in the LXX of Genesis 46:20 are original to that text, since the other names in the lists are common to both as well.
Num. 26:28 The sons of Joseph by their families: Manasseh and Ephraim.
29 The sons of Manasseh: of Machir, the family of the Machirites; and Machir fathered Gilead: of Gilead, the family of the Gileadites.
30 These are the sons of Gilead:
of [l]Iezer, the family of the Iezerites; of Helek, the family of the Helekites;
31 and
of Asriel, the family of the Asrielites; and
of Shechem, the family of the Shechemites;
32 and
of Shemida, the family of the Shemidaites; and
of Hepher, the family of the Hepherites. These are the generations of Joseph, not just his 2 sons.
As far as Goliath is concerned, the DSS and LXX both say 4 cubits and a span. That is what the oldest texts say and that is what they went by when translating the LXX
Concerning the 70 vs the 75 people Jacob had, the LXX includes the sons of Joseph and their offspring.
In re Isa. 7
The word for ‘virgin’ and ‘young woman’ are the same Hebrew word ‘alma’.
Alma is a betrothed virgin or one promised to be married, indicating that she is a young woman who had not had sexual intercourse.
The Greek word for virgin is ‘
parthenon’
Both bethulah and Alma can be translated ‘virgin’
Mary was that young betrothed woman. Isiah calls her 'alma', as opposed to bethulah.
