Celtic mythology - Acionna (Gaulish) - a water goddess/genius loci of the Orleanais region and the Essonne. Belisama, goddess of lakes and rivers, fire, crafts and light. Boann - goddess of the River Boyne (Irish). Dylan Eil Ton (Welsh) Grannus, a god associated with spas, the sun, fires and healing thermal and mineral springs. Lir (Irish), god of the sea. Llŷr (Welsh), god of the sea. Manannán mac Lir (Irish), god of the sea. Nodens, god associated with healing.