The name Isac is derived from the Hebrew name Yitzchak, meaning "he laughs" or "he will laugh." This name has its origins in the biblical story of Abraham and Sarah, who were promised a son in their old age and named him Isaac, which is the English translation of the Hebrew name Yitzchak.

The name Isac is a variant spelling of the more common English form, Isaac. This variant is particularly prevalent in Scandinavian countries such as Sweden, Denmark, and Norway, where it has been in use for centuries.

One of the earliest recorded instances of the name Isac can be found in the Bible's Book of Genesis, where Isaac is the son of Abraham and Sarah, and the father of Jacob and Esau. This biblical figure is revered in the Abrahamic religions of Judaism, Christianity, and Islam.

Throughout history, there have been several notable individuals bearing the name Isac. One of the earliest was Isac Comnenus, a Byzantine prince and military commander who lived in the 11th century. Another was Isac Angelus, a Byzantine emperor who reigned from 1185 to 1195.

In the field of science, Isac Newton (1642-1727) was a renowned English mathematician, physicist, astronomer, and natural philosopher, who is widely regarded as one of the most influential scientists of all time. His contributions include the laws of motion, the universal law of gravitation, and the development of calculus.

In the realm of literature, Isac Bashevis Singer (1902-1991) was a Polish-American writer and Nobel Laureate, known for his short stories and novels depicting the life and struggles of Jewish communities in Poland.

Another notable figure was Isac Merritt Singer (1811-1875), an American inventor and entrepreneur who founded the Singer Sewing Machine Company and revolutionized the sewing machine industry.

These are just a few examples of individuals throughout history who have borne the name Isac, a name with deep roots in the Hebrew language and biblical tradition, and a variant spelling that has gained popularity in various regions around the world.