The Teenage Mutant Ninja Turtles are four fictional teenaged anthropomorphic turtles named after Renaissance Italian artists. They were trained in the art of ninjutsu by their anthropomorphic rat sensei they call Master Splinter. From their home in sewers of New York City, they battle petty criminals, evil overlords, mutated creatures, and alien invaders while attempting to remain hidden from society. They were created by Kevin Eastman and Peter Laird.

The Teenage Mutant Ninja Turtles first appeared in an American comic book published by Mirage Studios in 1984 in Dover, New Hampshire. The concept arose from a humorous drawing sketched out by Eastman during a casual evening of brainstorming and bad television with Laird. Using money from a tax refund, together with a loan from Eastman’s uncle, the young artists self-published a single-issue comic intended to parody four of the most popular comics of the early 1980s: Marvel Comics’ Daredevil and New Mutants, Dave Sim’s Cerebus, and Frank Miller’s Ronin.

Donatello is named after the early Renaissance Italian artist and sculptor from Florence, Donatello.

Leonardo was named after the Italian polymath, painter, engineer, inventor, writer, anatomist, and sculptor, Leonardo da Vinci.

Michelangelo is named after the Italian Renaissance painter, sculptor, architect, poet, and engineer, Michelangelo.

Raphael is named after the Italian painter and architect of the High Renaissance, Raphael.

More Info: en.wikipedia.org