Acts 7:14-16 in reference to "he" is "Joseph", and "our fathers" were Joseph's brothers, the other tribes, and his immediate father, "Jacob"/"Israel", listing them as "seventy-five people" (KJB - "threescore and fifteen souls", Noah is
not included,
neither is Abraham in vs 14-15; Abraham is only included in vs 16 by the mention of the purchase of the land, but he is
not a part of the "our fathers" in the "threescore and fifteen souls"). See Genesis 46:6-7,15,25-27; Deuteronomy 10:22:
Gen 46:6 And they took their cattle, and their goods, which they had gotten in the land of Canaan, and came into Egypt, Jacob, and all his seed with him:
Gen 46:7 His sons, and his sons' sons with him, his daughters, and his sons' daughters, and all his seed brought he with him into Egypt.
Gen 46:15 These be the sons of Leah, which she bare unto Jacob in Padanaram, with his daughter Dinah: all the souls of his sons and his daughters were thirty and three.
Gen 46:25 These are the sons of Bilhah, which Laban gave unto Rachel his daughter, and she bare these unto Jacob: all the souls were seven.
Gen 46:26 All the souls that came with Jacob into Egypt, which came out of his loins, besides Jacob's sons' wives, all the souls were threescore and six;
Gen 46:27 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.
Deu 10:22 Thy fathers went down into Egypt with threescore and ten persons; and now the LORD thy God hath made thee as the stars of heaven for multitude.
Act 7:14 Then sent Joseph, and called his father Jacob to him, and all his kindred, threescore and fifteen souls.
Act 7:15 So Jacob went down into Egypt, and died, he, and our fathers,
33, 66, 70, 75.
[1] 33 - Count all the sons and daughters of Jacob in this list (if we subtract "Er", "Onan" (dying in Canaan) and include in their place "Dinah" (vs 15) and "Benjamin" (Genesis 45:14)).
Gen 46:8 And these are the names of the children of Israel, which came into Egypt, Jacob and his sons: [01] Reuben, Jacob's firstborn.
Gen 46:9 And the sons of Reuben; [02] Hanoch, and [03] Phallu, and [04] Hezron, and [05] Carmi.
Gen 46:10 And the sons of [06] Simeon; [07] Jemuel, and [08] Jamin, and [09] Ohad, and [10] Jachin, and [11] Zohar, and [12] Shaul the son of a Canaanitish woman.
Gen 46:11 And the sons of [13] Levi; [14] Gershon, [15] Kohath, and [16] Merari.
Gen 46:12 And the sons of [17] Judah; [XX] Er, and [XX] Onan, and [18] Shelah, and [19] Pharez, and [20] Zerah: but Er and Onan died in the land of Canaan. And the sons of Pharez were [21] Hezron and [22] Hamul.
Gen 46:13 And the sons of [23] Issachar; [24] Tola, and [25] Phuvah, and [26] Job, and [27] Shimron.
Gen 46:14 And the sons of [28] Zebulun; [29] Sered, and [30] Elon, and [31] Jahleel.
Gen 46:15 These be the sons of Leah, which she bare unto Jacob in Padanaram, with his daughter [32] Dinah: all the souls of his sons and his daughters were thirty and three. [33] Benjamin (Genesis 45:14)
[2] 66 - Count the whole family later, minus the four 'wives', so, Jacob/Israel and children.
Gen 46:16 And the sons of [34] Gad; [35] Ziphion, and [36] Haggi, [37] Shuni, and [38] Ezbon, [39] Eri, and [40] Arodi, and [41] Areli.
Gen 46:17 And the sons of [42] Asher; [43] Jimnah, and [44] Ishuah, and [45] Isui, and [46] Beriah, and [47] Serah their sister: and the sons of Beriah; [48] Heber, and [49] Malchiel.
Gen 46:18 These are the sons of Zilpah, whom Laban gave to Leah his daughter, and these she bare unto Jacob, even sixteen souls.
Gen 46:19 The sons of Rachel Jacob's wife; Joseph, and Benjamin.
Gen 46:20 And unto Joseph in the land of Egypt were born Manasseh and Ephraim, which Asenath the daughter of Potipherah priest of On bare unto him.
Gen 46:21 And the sons of [XX, already counted; Genesis 45:14, 46:15] Benjamin were [50] Belah, and [51] Becher, and [52] Ashbel, [53] Gera, and [54] Naaman, [55] Ehi, and [56] Rosh, [57] Muppim, and [58] Huppim, and [59] Ard.
Gen 46:22 These are the sons of Rachel, which were born to Jacob: all the souls were fourteen.
Gen 46:23 And the sons of [60] Dan; [61] Hushim.
Gen 46:24 And the sons of [62] Naphtali; [63] Jahzeel, and [64] Guni, and [65] Jezer, and [66] Shillem.
Gen 46:25 These are the sons of Bilhah, which Laban gave unto Rachel his daughter, and she bare these unto Jacob: all the souls were seven.
Gen 46:26 All the souls that came with Jacob into Egypt, which came out of his loins, besides Jacob's sons' wives, all the souls were threescore and six;
[3] 70 - Previous count (66) and now including Jacob's 'wives' (living, 3- Leah, Zilpah & Bilhah) and Jacob himself; therefore (1) Jacob/Israel, (66) children that made it into Egypt (not including "Er" and "Onan" dying in Canaan; Genesis 46:12) and (3) living wives (Rachel dying in Canaan, near Bethlehem; Genesis 35:19, 48:7) = 70, or if we do not count the 'wives' of Jacob, we can count instead (68) Joseph, (69) Manasseh, & (70) Ephraim already in Egypt.
Gen 46:27 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.
Exo 1:5 And all the souls that came out of the loins of Jacob were seventy souls: for Joseph was in Egypt already.
Deu 10:22 Thy fathers went down into Egypt with threescore and ten persons; and now the LORD thy God hath made thee as the stars of heaven for multitude.