Gen 22:15-18
15 The angel of the LORD called to Abraham from heaven a second time
16 and said, "I swear by myself, declares the LORD, that because you have done this and have not withheld your son, your only son,
17 I will surely bless you and make your descendants as numerous as the stars in the sky and as the sand on the seashore. Your descendants will take possession of the cities of their enemies,
18 and through your offspring all nations on earth will be blessed, because you have obeyed me."
(NIV)

And To Abraham's Son, He says

Gen 26:1-5

1 And there was a famine in the land, beside the first famine that was in the days of Abraham. And Isaac went unto Abimelech king of the Philistines unto Gerar.
2 And the LORD appeared unto him, and said, Go not down into Egypt; dwell in the land which I shall tell thee of:

3 Sojourn in this land, and I will be with thee, and will bless thee; for unto thee, and unto thy seed, I will give all these countries, and I will perform the oath which I sware unto Abraham thy father;
4 And I will make thy seed to multiply as the stars of heaven, and will give unto thy seed all these countries; and in thy seed shall all the nations of the earth be blessed;
5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
(KJV)

And To Abraham's Grandson He Says:

Gen 28:10-15
10 And Jacob went out from Beersheba, and went toward Haran.
11 And he lighted upon a certain place, and tarried there all night, because the sun was set; and he took of the stones of that place, and put them for his pillows, and lay down in that place to sleep.
12 And he dreamed, and behold a ladder set up on the earth, and the top of it reached to heaven: and behold the angels of God ascending and descending on it.
13 And, behold, the LORD stood above it, and said, I am the LORD God of Abraham thy father, and the God of Isaac: the land whereon thou liest, to thee will I give it, and to thy seed;
14 And thy seed shall be as the dust of the earth, and thou shalt spread abroad to the west, and to the east, and to the north, and to the south: and in thee and in thy seed shall all the families of the earth be blessed.
15 And, behold, I am with thee, and will keep thee in all places whither thou goest, and will bring thee again into this land; for I will not leave thee, until I have done that which I have spoken to thee of. (KJV)

And to Ephraim And Manasseh (Joseph's Sons) Israel Says:

Gen 48:11-22
11 And Israel said unto Joseph, I had not thought to see thy face: and, lo, God hath shewed me also thy seed.
12 And Joseph brought them out from between his knees, and he bowed himself with his face to the earth.
13 And Joseph took them both, Ephraim in his right hand toward Israel's left hand, and Manasseh in his left hand toward Israel's right hand, and brought them near unto him.
14 And Israel stretched out his right hand, and laid it upon Ephraim's head, who was the younger, and his left hand upon Manasseh's head, guiding his hands wittingly; for Manasseh was the firstborn.
15 And he blessed Joseph, and said, God, before whom my fathers Abraham and Isaac did walk, the God which fed me all my life long unto this day,
16 The Angel which redeemed me from all evil, bless the lads; and let my name be named on them, and the name of my fathers Abraham and Isaac; and let them grow into a multitude in the midst of the earth.
17 And when Joseph saw that his father laid his right hand upon the head of Ephraim, it displeased him: and he held up his father's hand, to remove it from Ephraim's head unto Manasseh's head.
18 And Joseph said unto his father, Not so, my father: for this is the firstborn; put thy right hand upon his head.
19 And his father refused, and said, I know it, my son, I know it: he also shall become a people, and he also shall be great: but truly his younger brother shall be greater than he, and his seed shall become a multitude of nations.
20 And he blessed them that day, saying, In thee shall Israel bless, saying, God make thee as Ephraim and as Manasseh: and he set Ephraim before Manasseh.
21 And Israel said unto Joseph, Behold, I die: but God shall be with you, and bring you again unto the land of your fathers.
22 Moreover I have given to thee one portion above thy brethren, which I took out of the hand of the Amorite with my sword and with my bow. (KJV)

Note: Israel GAVE HIS NAME, Israel ONLY TO Ephraim and Manesseh..

Then in the next chapter he blesses his other sons AS JACOB...

He had already passed the Spiritual blessing name of Israel to
Joseph's sons...

Gen 49:1-2

1 And Jacob called unto his sons, and said, Gather yourselves together, that I may tell you that which shall befall you in the last days.
2 Gather yourselves together, and hear, ye sons of Jacob; and hearken unto Israel your father. (KJV)

Tis interesting what truth is there if you look....