Genesis 37:
It was for the sake of variety. The two names are interchangeable. Similarly, Jesus gave Simon the new name “Cephas” (John 1:42), but he still called him by his old name later.
What is the difference between Abraham and Sarah's new names and Jacob's being called Israel interchangeably?
Repeating "Abram" by "Abraham" sounds monotonous. The same goes for "Sarai" and "Sarah".
Even God called him Jacob after He changed his name. Genesis 46:2 These are the generations of Jacob.
Joseph, being seventeen years old, was pasturing the flock with his brothers. He was a boy with the sons of Bilhah and Zilpah, his father’s wives. And Joseph brought a bad report of them to their father. 3 Now Israel loved Joseph more than any other of his sons, because he was the son of his old age. And he made him a robe of many colors.
Sometimes, the two names are used in parallelism, Psalm 53:2 And God spoke to Israel in a vision at night and said, “Jacob! Jacob!” “Here I am,” he replied.
Why was the name "Jacob" still used after his name change?6 Oh, that salvation for Israel would come out of Zion! When God restores the fortunes of his people, let Jacob rejoice, let Israel be glad.
It was for the sake of variety. The two names are interchangeable. Similarly, Jesus gave Simon the new name “Cephas” (John 1:42), but he still called him by his old name later.
What is the difference between Abraham and Sarah's new names and Jacob's being called Israel interchangeably?
Repeating "Abram" by "Abraham" sounds monotonous. The same goes for "Sarai" and "Sarah".