Mart

TANIWHA's Lore : https://www.artstation.com/artwork/aoKReX
He's full name is Martin. In french, the kingfisher is called "Martin-pécheur" ( "fishing Martin" ) so, as he's one of the best fishermen of Haumaru Town, I couldn't resist to name him that way X)
In Te Reo Māori, it's Kōtare !