What is the etymology of Hatteria, another name for tuatara?

Answer 1

If you break the word, you find Hat*te*ri*a or Hat and tera.
Hat is a 'cap" and "tera" in Greek means monster.
Since Sphenodon has a series of dorsal spines, it is appropriate that it is named like that. The name tuatara comes from a polynesian language, Maori, which is one of the three languages of New Zealand.Tuatara means "peaks on the back".