In England, it began to be used as a given name after the Protestant Reformation. It was moderately common in the 19th century. It began to rise in popularity again in the late 1980s, probably helped along by characters on the American television shows Friends (1994-2004) and Charmed (1998-2006). It is currently much more common in the United Kingdom, Australia and New Zealand than the United States.
A moon of Saturn bears this name, in honour of the Titan.
The name became popular in the English-speaking world outside of Ireland in the middle of the 20th century, and elsewhere in Europe in the latter half of the 20th century. Famous bearers include the American actors Kevin Costner (1955-) and Kevin Bacon (1958-). It was also borne by the character Kevin McCallister in the 1990 comedy movie Home Alone.
During the 20th century, Graham was more common in the United Kingdom, Australia and Canada than it was in the United States. However, it has been rising on the American charts since around 2006.
In modern times, this name is borne by American fashion designer Calvin Klein (1942-), as well as one of the main characters from Bill Watterson's comic strip Calvin and Hobbes (published from 1985 to 1995).