Ἡρακλῆς

Ἡρακλῆς (Hēraklês) comes from Ἥρα (Hḗra) + κλέος (kléos, 'glory'), meaning 'glory of Hera' or 'famous through Hera.' This is the cruelest name in Greek mythology. Hera hated Heracles from the moment of his illegitimate birth — Zeus had fathered him with the mortal Alcmene — and she spent decades engineering his suffering. She sent serpents to his cradle. She drove him mad, causing him to murder his own wife and children. The twelve labors were his penance for a crime Hera herself caused. His name honored the goddess who tormented him.

The Romans adopted him as Hercules, softening the Greek aspirate and dropping the Hera connection from common awareness. It was the Roman version that conquered European languages. By the Renaissance, 'a Hercules' meant any man of extraordinary strength. By the 1700s, herculean was a standard English adjective: 'requiring the strength of Hercules.' Samuel Johnson included it in his 1755 dictionary. The word had completed its journey from proper noun to common adjective in about two thousand years.

The twelve labors gave Western culture its template for the impossible task list. Slay the Nemean lion. Capture the Erymanthian boar. Clean the Augean stables in a single day. Steal the apples of the Hesperides. Each labor was designed to be fatal. Heracles survived them all through a combination of physical strength, cunning, and occasional divine assistance. The phrase 'Herculean task' still means exactly what it meant in antiquity: a job that should not be possible but must be done anyway.

The name entered commerce early. The Pillars of Hercules (the Strait of Gibraltar) marked the edge of the known world — the Spanish dollar bore the image, and the dollar sign ($) may derive from the pillars wound with a banner. Hercules became a constellation, a beetle genus, a military transport aircraft (the C-130 Hercules, in service since 1956), and a Disney film. The irony of his name has never been resolved. He was famous through Hera, and Hera would have preferred he was never born.