Acionna was a Gallo-Roman water goddess, attested in the Orléanais region.
In 1822, Jean-Baptiste Jollois, one of the founding fathers of archaeology in the region, carried out excavations on the so-called "fontaine de l'Étuvée", an ancient water-source which he artificially drained to rediscover if it could still supply the town's public water fountains. In a former cesspit, he found a roughly square (0.6m by 0.55m) stone tablet with a well-preserved votive inscription, datable by its style to the 2nd century. It reads:
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:"To August Acionna, Capillus son of Illiomarus fferedthis portico with these ornaments, in willing and right fulfillment of his vow"The original stela was deposited in the new Musée historique d'Orléans on its discovery and, though the original has since disappeared, it is still known from drawings and lithographs Jollois made of it and from a plaster-cast of it now in the Orléans museum.
Acionna is not attested in any other sources, but the ending ''-onna'' indisputably indicates a Latinized Gallic name. The stela's findspot in an ancient source suggests that she is a water goddess. Her name may be linked to that of the river
Essonne
Essonne () is a department of France in the southern Île-de-France region. It is named after the river Essonne. In 2019, it had a population of 1,301,659 across 194 communes.forêt d'Orléans (this river's upper course is today called the Œuf and only takes up the name Essonne at its junction with the Rimarde). Another river of the forêt d'Orléans, the "Esse" or "Ruisseau des Esses", flowing south into the sea in the Bionne (a Celtic name), might also have borne this name.
Acionna probably had her sanctuary at the Fontaine de l'Etuvée in the commune of