Bersilus

Over time, this beautiful white and blue dragon was born, its scales shining in the moonlight, above all, it is felt that when the island is under threat, it comes to the surface to protect its people, one day, a mysterious ship approached, and three small vessels surrounded the island, as best they could, the women invoked the mystical dragon to save them and keep these intruders away from the island. The dragon emerged from the bottom of the island's lake and went out to sea. A loud roar was heard, so loud that a flash from the earth to the sky flashed.
Suddenly, as best they could, our brave guardian dragon spewed white fire, but it didn't burn, the fascinating thing was that it froze everything it touched. It threw white fire at all the invading ships, and then it passed over them, sinking these ships. The few who survived sailed away on small rafts and told this story that endures over time.
To call the dragon to rest at the bottom of the island's lake, the women sang to him in beautiful voices, the god-like song "Bersilus" to put the dragon to sleep.
So a village on an island where women adore one dragon and pray he keeps the islands safe. Which other islands and why pray for that if there's only 1 village?
If the women want the dragon to protect them why do the sing him asleep?