Isaac" is of Hebrew origin, meaning "he will laugh." It is derived from the story of Abraham and Sarah who laughed upon hearing they would have a child in their old age. The name Isaac was borne by the biblical patriarch whose son, Jacob, was renamed Israel, which means "strives with God." This name has been used throughout history, including being the name of two kings of Judah, Isaac I and II, as well as several notable figures like Isaac Newton, an English physicist and mathematician. The variant spelling Isaul is less common but still of Hebrew origin and meaning.
"Isaac is a classic name with steady popularity over decades, experiencing peaks and valleys from the late 70s to recent years."