Why Genesis first says sixty-six
Genesis 46:26 describes the people who “came with Jacob into Egypt,” came from his body, and were not his sons’ wives. That travelling-descendant total is sixty-six.
The sixty-six does not include Jacob himself. It also does not include Joseph or Joseph’s two sons, Manasseh and Ephraim, because all three were already living in Egypt. Adding those four people to sixty-six produces seventy.
How Genesis reaches seventy
Genesis 46:27 says that all the souls of Jacob’s house which came into Egypt were seventy. This is the household total: the sixty-six descendants who travelled with Jacob, plus Jacob, Joseph, Ephraim, and Manasseh.
Exodus 1:5 and Deuteronomy 10:22 repeat the seventy-person tradition. “Came into Egypt” can describe the family’s migration as a whole even though Joseph and his sons were already there when Jacob arrived.
The family groups in Genesis 46
The chapter organizes the household by Jacob’s wives and their handmaids. The Leah group is numbered at thirty-three, the Zilpah group at sixteen, the Rachel group at fourteen, and the Bilhah group at seven. Together these group totals equal seventy.
The list includes sons, a daughter, a granddaughter, and grandsons. Er and Onan are named but explicitly said to have died in Canaan, so they are not part of the migration total. Jacob’s sons’ wives are also excluded.
Why Acts 7:14 says seventy-five
In Acts 7:14 Stephen says that Joseph called Jacob and all his kindred to Egypt, “threescore and fifteen souls”—seventy-five. This agrees with the larger total found in the ancient Greek form of Genesis and Exodus commonly called the Septuagint.
The Greek form of Genesis 46 includes five additional descendants through Joseph’s sons, Ephraim and Manasseh. Those additional family members raise the household total from seventy to seventy-five. Acts therefore reflects a known Jewish scriptural tradition rather than inventing five otherwise unrelated people.
Does Acts contradict Genesis?
The figures should be read with attention to textual form and counting scope. The KJV Old Testament follows the Hebrew textual tradition at Genesis 46 and Exodus 1, where the household total is seventy. Acts preserves Stephen’s seventy-five-person wording, which corresponds to the Greek Old Testament tradition familiar to Greek-speaking Jews.
Both totals describe Jacob’s family entering its Egyptian phase, but the genealogical horizon is not identical. One counts the seventy-name Hebrew household structure; the other includes five further descendants in Joseph’s Egyptian line.
What the number is meant to show
The theological emphasis is the growth of one family into a nation. Jacob entered Egypt with a comparatively small household, yet Exodus opens by describing the children of Israel multiplying abundantly.
The later census in Numbers records hundreds of thousands of Israelite men. The movement from seventy—or seventy-five in the expanded Greek genealogy—to a numerous people highlights the fulfilment of God’s promise to multiply Abraham’s descendants.