Tradition / Region: French Mythology, Luxembourg Mythology
Alternate Names: Melusine, Melusina
Category: Mermaid
The Myth
Mélusine is a female freshwater spirit associated with holy wells and rivers. She is usually depicted as a beautiful woman with the lower body of a serpent or fish. Some depictions give her wings, two tails, or both. Her legends are particularly associated with northern and western France, Luxembourg, and the Low Countries.
In the literary tradition recorded by Jean d’Arras in 1393, Mélusine is the eldest of three daughters born to Pressine, a fairy, and Elinas, the King of Albany. When Elinas breaks his promise never to see Pressine while she is giving birth to or bathing their children, Pressine leaves him and takes her daughters to the Isle of Avalon.
On her fifteenth birthday, Mélusine learns why her mother abandoned their father. Seeking revenge, she persuades her sisters to help her imprison Elinas and his riches inside a mountain. Pressine is furious that her daughters have punished their father and imposes different punishments upon them. Mélusine is banished from Avalon and cursed to take the form of a two-tailed serpent from the waist down every Saturday. If a man marries her, he must promise never to see her on that day. Should he keep his promise, she can live contentedly with him. If he breaks it, she will remain a serpent and appear in her monstrous form to the noble family, lamenting for three days whenever a descendant dies or the family’s fortress changes hands.
Mélusine settles in a forest near Coulombiers, by a stream close to Poitiers. There she encounters Raymondin, Count of Poitiers, who is distraught after accidentally killing his uncle. She comforts him, and they eventually marry after he agrees never to see her on a Saturday.
For ten years, Raymondin honours his promise. During this time, Mélusine bears him ten sons and oversees the construction of magnificent castles, bringing her husband wealth, lands, and power. Some versions describe their sons as physically deformed, although their parents love them.
Eventually, Raymondin’s family encourages him to grow suspicious of Mélusine’s private activities on Saturdays. He breaks his promise and secretly watches her bathing, discovering that her lower body has taken the form of a serpent. He initially conceals what he has seen. However, after one of their adult sons murders his brother, Raymondin publicly blames Mélusine and calls her a serpent.
Mélusine transforms into a dragon, gives Raymondin two magical rings, and flies away, never to be seen again in public. According to the tale, she returns at night to nurse her two youngest children, who are still infants.
Mélusine’s story became associated with several European ruling dynasties. Medieval literature and folklore claimed that the House of Lusignan, the House of Anjou and its descendants the Plantagenets, and the Limburg-Luxemburg dynasty descended from her. Her legend combines motifs of water nymphs, mermaids, guardian spirits, fairies, and supernatural women whose mysterious nature becomes a source of conflict when their human partners violate a forbidden condition.
Sources
Wikipedia contributors. (n.d.). Melusine. In Wikipedia, The Free Encyclopedia. Retrieved February 14, 2026, from https://en.wikipedia.org/wiki/Melusine