This is one of the few Old English names to be used throughout Europe (in various spellings). A famous bearer was the British composer Edward Elgar (1857-1934). It was also used by author Charlotte Brontë for the character Edward Rochester, the main love interest of the title character in her novel Jane Eyre (1847).
Due to the popularity of the biblical character, the name came into use in England during the Middle Ages. Though it became rare by the 15th century, it was revived after the Protestant Reformation. Famous bearers of this name include English author Daniel Defoe (1660-1731), Swiss mathematician Daniel Bernoulli (1700-1782), and American frontiersman Daniel Boone (1734-1820).
The name became regularly used in the Christian world due to the fame of Saint Anthony the Great, a 4th-century Egyptian hermit who founded Christian monasticism. Its popularity was reinforced in the Middle Ages by the 13th-century Saint Anthony of Padua, the patron saint of Portugal. It has been commonly (but incorrectly) associated with Greek ἄνθος (anthos) meaning "flower", which resulted in the addition of the h to this spelling in the 17th century.
According to Genesis in the Old Testament Adam was created from the earth by God (there is a word play on Hebrew אֲדָמָה (ʾaḏama) meaning "earth"). He and Eve were supposedly the first humans, living happily in the Garden of Eden until they ate the forbidden fruit from the tree of knowledge of good and evil. As a result they were expelled from Eden to the lands to the east, where they gave birth to the second generation, including Cain, Abel and Seth.
As an English Christian name, Adam has been common since the Middle Ages, and it received a boost after the Protestant Reformation. A famous bearer was Scottish economist Adam Smith (1723-1790).