The name William is derived from the name Wilhelm.
Famous bearers
Bearers include William Shakespeare (1564 - 1616), an English poet and playwright;
William Wordsworth (1770 - 1850), an English romantic poet;
William McKinley (1843 - 1901), the 25th President of the United States;
William Howard Taft (1857 - 1930), the 27th President of the United States;
William "Bill" Clinton (born 1946), the 42nd President of the United States;
William Moseley (born 1987), an English actor.