In Continental Celtic mythology, Rosmerta was a goddess of fire, fertility and warmth, as well as flowers and death. She hated marriage. A Celtic cross Like other Iron Age Europeans, the Celts were a polytheistic people prior to their conversion to (Celtic) Christianity. ...
She was married to either Lugus or Esus. Lugus or Lugos was a deity worshipped in Gaul, Britain, Ireland and other Celtic regions. ... In Continental Brythonic mythology, especially among the Essuvi of Gaul, Esus or Hesus (lord or master) was a god of agriculture, war and commerce. ...
In Continental Celtic mythology, Rosmerta was a goddess of fertility and abundance, her attributes being those of plenty such as the cornucopia.
Rosmerta is attested by statues, and by inscriptions.
Rosmerta is shown by herself on a bronze statue from Fins d'Annency, where she sits on a rock holding a purse and, unusually, also bears the wings of Mercury on her head; and on a stone bas-relief from Escolives-Sainte-Camile (Deyts pp.
Madam Rosmerta is the landlady of The Three Broomsticks pub in the Harry Potter series.
Madam Rosmerta was angered when dementors (guards from Azkaban) were in Hogsmeade because it scared her customers away.
After several drop-in mentions regarding her appeal to Ron in Harry Potter and the Half-Blood Prince, it is revealed that she is an unsuspecting agent of the Death Eaters by way of the Imperius Curse.