In Greek, the name “Thanos” is a short form of the personal name “Athanasios,” which means “immortal.” The name, however, is also derived from the name “Thanatos,” a Greek mythological figure who carries humans off to the underworld when their lives are done. For Thanos, therefore, his name literally means “death.”

What does Thanos mean?

Greek: from a short form of the personal name Athanasios, literally 'immortal', the name of several saints venerated in the Greek Orthodox Church, the most important of them being Athanasios the Great (293–373), theologian and patriarch of Alexandria in Egypt.

Did Thanos do it for Death?

The Infinity saga

Thanos is eventually resurrected, and collects the Infinity Gems once again. He uses the gems to create the Infinity Gauntlet, making himself omnipotent, and erases half the living things in the universe to prove his love to Death.