Terengganu

Why Trengganu?
It's because, we spell Terengganu, but we use to say Trengganu.
Have a nice stay in Trengganu.

Why My-Trengganu?
Before we proceed, what is My? It's "me", belong to me. In this case, it's not mine but ours. Using our-trengganu only will give you one meaning. The Trengganu is belong to us.
My also bring an "image" of Malaysia. It's to show that Trengganu "is" Malaysia.
Thirdly, we can say the the word my mean come or "mari" and if spelled in Malay it will be "mai". "Mai" is a dialect of Kedah's people in saying mari which means come.