Calvin is a slightly quirky but cozy name that has a fashion edge thanks to Calvin Klein. It has been steadily on the popularity list since records were kept, never lower than Number 250, peaking in the 1920s, the era of the Calvin (originally John Calvin ) Coolidge presidency.
The name came into use as a first name in honor of John Calvin--born Jehan Cauvin-- the seventeenth century French Protestant reformer whose strict doctrines became the basis of Calvinism, and the name was taken up as a tribute to him.
Other associations include the above-mentioned Calvin Klein (and his famous 'Calvins' ads), humorous writer Calvin Trillin, the comic strip "Calvin & Hobbes" --and it's also the birth name of Snoop Dog. Calvin O'Keefe is the main character in Madeleine L'Engle's A Wrinkle in Time.