Isaac was named because when his mother, Sarah, overheard that she would bear a child in her old age, she laughed (Genesis 18:10-15, 21:6-7). Some commentators believe that in the Book of Amos there is some suggestion that Israel may actually be another name for Isaac (Amos 7:9, 16) despite the Bible stating that Israel is the later name given to Isaac's son Jacob (Genesis 32:22-28, especially 28).
Isaac was born to Abraham by his wife Sarah, and the only child they had together. He was the longest lived of the three patriarchs (Genesis 21:1-3). Isaac was circumcised by his father when eight days old (Genesis 4-7); and a great feast was held in connection with his being weaned.
The next memorable event in his life is that connected with the story of God testing Abraham by asking him to offer Isaac as a sacrifice on a mountain (Mount Moriah) in the land of Moriah (Genesis 22, current location of The Temple Mount).