Read Genesis 46:27 Using Other Translations
And the sons of Joseph, which were born him in Egypt, were two souls: all the souls of the house of Jacob, which came into Egypt, were threescore and ten.
And the sons of Joseph, who were born to him in Egypt, were two. All the persons of the house of Jacob who came into Egypt were seventy.
In addition, Joseph had two sons who were born in Egypt. So altogether, there were seventy members of Jacob’s family in the land of Egypt.