What is a proper noun for island?

There isn't a single, universally accepted proper noun for "island." Proper nouns are specific names for individual people, places, or things.

To find a proper noun for an island, you need to know which island you're talking about.

For example, here are some proper nouns for islands:

* Hawaii

* Manhattan

* Greenland

* Tasmania

* Isle of Wight

If you provide me with more context about the island you're interested in, I can help you find the appropriate proper noun.