Demonyms for people from a country name ended with a letter 'U'

Demonyms - The name used for the people who live in a particular state.
   [dem-uh-nim]

This is tricky,

Peru -  Peruvian
Palau -  Palauan
Nauru - Nauruan
Tuvalu - Tuvaluan

So,  what for Terengganu people?

Yes, you're right. It is Terengganuan.