Phlegethon as a Baby Name. Meaning and Origin of Phlegethon

What is the meaning of the name Phlegethon ?

The baby name Phlegethon is a Male name , 3 syllables long and is pronounced /fləˈdʒɛθən/ (fluh-JETH-ən).

Phlegethon is Greek in Origin.

Phlegethon derives from Ancient Greek Phlegethōn (Φλεγέθων), built on the verb phlégo “to burn, blaze,” and literally denotes the “blazing/fiery” river of Hades; the compound form Pyriphlegethon (Πυριφλεγέθων) means “fire-blazing.” Through Latin and later English literature, Phlegethon came to symbolize consuming fire and purgation, giving the name an intense meaning: “blazing one,” “river of fire,” or “he who burns fiercely.”

Attested across classical and medieval texts - from Plato’s Phaedo and Virgil’s Aeneid to Dante’s Inferno, where it becomes a river of boiling blood - Phlegethon was not used as a personal name in antiquity. As a modern given name it remains exceedingly rare, occasionally adopted for its mythic weight or Gothic flair. Variants and spellings include Phlegethon (standard), Phlegeton (modern simplification), Phlegthon, and the extended Pyriphlegethon; a related, historically used Greek name is Phlegon (Φλέγων, “burning”).

⚙ Phlegethon is absent from every birth registry and name dataset we follow. That's typically a sign of a rare name, a regional or traditional one, or a modern coinage. Either way, it remains a genuinely rare choice.