This name has been used in England since the 13th century, though it became more common in Scotland where it was borne by several kings. In the 17th century the Scottish king James VI inherited the English throne, becoming the first ruler of all Britain, and the name grew much more popular. In American name statistics (recorded since 1880) this name has never been out of the top 20, making it arguably the era's most consistently popular name. It was the top ranked name for boys in the United States from 1940 to 1952.
Famous bearers include the English explorer James Cook (1728-1779), the Scottish inventor James Watt (1736-1819), and the Irish novelist and poet James Joyce (1882-1941). This name has also been borne by six American presidents. A notable fictional bearer is the British spy James Bond, created by author Ian Fleming in 1953.
This name became very popular in the second half of the 20th century. It reached the top ten names for boys in France (by 1997), Belgium (1998), Denmark (2003), Canada (2008), the Netherlands (2009), New Zealand (2009), Australia (2010), Scotland (2013), Spain (2015) and the United States (2018).
Due to the renown of the saint, this name has been widely used in the Christian world. It has been common in England since the 12th century, though it became a bit less popular after the Protestant Reformation. The name has been borne by five popes and two tsars of Russia.
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.