This name was later borne by three other English kings, as well as rulers of Scotland, Sicily (of Norman origin), the Netherlands and Prussia. Other famous bearers include William Wallace, a 13th-century Scottish hero, and William Tell, a legendary 14th-century Swiss hero (called Wilhelm in German, Guillaume in French and Guglielmo in Italian). In the literary world it was borne by dramatist William Shakespeare (1564-1616), poet William Blake (1757-1827), poet William Wordsworth (1770-1850), dramatist William Butler Yeats (1865-1939), author William Faulkner (1897-1962), and author William S. Burroughs (1914-1997).
In the American rankings (since 1880) this name has never been out of the top 20, making it one of the most consistently popular names (although it has never reached the top rank). In modern times its short form, Liam, has periodically been more popular than William itself, in the United Kingdom in the 1990s and the United States in the 2010s.
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).