As an English name it can also derive from the month of August, which was named for the Roman emperor Augustus.
Among Christians, this name was originally more common in Eastern Europe. It was borne in the 12th century by Saint Elizabeth of Hungary, a daughter of King Andrew II who used her wealth to help the poor. In medieval England it was occasionally used in honour of the saint, though the form Isabel (from Occitan and Spanish) was more common. It has been very popular in England since the reign of Queen Elizabeth I in the 16th century. In American name statistics (as recorded since 1880) it has never ranked lower than 30, making it the most consistently popular name for girls in the United States.
Besides Elizabeth I, this name has been borne (in various spellings) by many other European royals, including a ruling empress of Russia in the 18th century. Famous modern bearers include the British queen Elizabeth II (1926-2022) and actress Elizabeth Taylor (1932-2011).
The name was very popular until the 15th century in England, usually in the vernacular form Maud. Both forms were revived by the 19th century. This name appears in the popular Australian folk song Waltzing Matilda, written in 1895.
The biblical Moses was drawn out of the Nile by the pharaoh's daughter and adopted into the royal family, at a time when the Israelites were slaves in Egypt. With his brother Aaron he demanded the pharaoh release the Israelites, which was only done after God sent ten plagues upon Egypt. Moses led the people across the Red Sea and to Mount Sinai, where he received the Ten Commandments from God. After 40 years of wandering in the desert the people reached Canaan, the Promised Land, but Moses died just before entering it.
In England, this name has been commonly used by Christians since the Protestant Reformation, though it had long been popular among Jews.