Biblical name comes from the Hebrew word (יצחק) [Yitzhak] - "she laughs/will laugh (Sarah laughed when she was told by God to have a son in her old age)". Arabic form - Ishaq.
Ugaritic texts dating from the 13th century BCE refer to the benevolent smile of the Canaanite deity El. Genesis, however, ascribes the laughter to Isaac's mother Sarah rather than El. According to the Biblical narrative, Sarah laughed privately when Elohim imparted to Abraham the news of their son's eventual birth. Sarah laughed because she was past the age of childbearing; both she and Abraham were advanced in age.
Isaac described in the Hebrew Bible, he was the only son Abraham had with his wife Sarah, and was the father of Jacob and Esau. Isaac is one of the three patriarchs of the Jewish people. According to the Book of Genesis, Abraham was 100 years old when Isaac was born, and Sarah was beyond childbearing years. Isaac was the only Biblical patriarch whose name was not changed, and the only one who did not leave Canaan. Compared to those of Abraham and Jacob, Isaac's story relates fewer incidents of his life. He died when he was 180 years old, making him the longest-lived patriarch. The New Testament contains several references to Isaac. The early Christian church viewed Abraham's willingness to follow God's command to sacrifice Isaac as an example of faith and obedience. Islam considers Ishaq (Isaac) as a prophet of Islam which describes Isaac as the father of the Israelites and a righteous servant of God. Some academic scholars have described Isaac as "a legendary figure", while others view him as "a figure representing tribal history, though as a historical individual" or as "a seminomadic leader".