In the Bible, Israel refers to a person, a people, a nation, and a place.
Jacob/Israel had twelve sons, which eventually became the twelve tribes of Israel (Matthew 19:28), the people of Israel, and later the nation of Israel. In the Bible, they were called the Israelites; nowadays, they are called Israelis.
The land in which they eventually settled was also called Israel.
A lifelong student of the Bible, Peter DeHaan, PhD, wrote the 700-page website ABibleADay.com to encourage people to explore the Bible. His main blog and numerous books urge Christians to push past the status quo and reconsider how they practice their faith in every area of their lives.