As an English name, it was occasionally used during the Middle Ages in honour of the Old Testament heroine. It did not become common until after the Protestant Reformation, at which time it was often spelled Susan.
As a Christian name, Samuel came into common use after the Protestant Reformation. It has been consistently popular in the English-speaking world, ranking yearly in the top 100 names in the United States (as recorded since 1880) and performing similarly well in the United Kingdom.
Famous bearers include English poet Samuel Taylor Coleridge (1772-1834), American inventor Samuel Morse (1791-1872), Irish writer Samuel Beckett (1906-1989), and American actor Samuel L. Jackson (1948-). This was also the real name, Samuel Clemens, of the American author Mark Twain (1835-1910).
This name was initially more common among Eastern Christians, though it came to the West by the Middle Ages. It was borne by six kings of France and five kings of Spain. It was regularly used in England during the Middle Ages, although the Spanish king Philip II, who attempted an invasion of England, helped make it less common by the 17th century. It was revived in the English-speaking world in the 19th century. Famous bearers include the Elizabethan courtier and poet Philip Sidney (1554-1586) and the American science fiction novelist Philip K. Dick (1928-1982).