It's important to note that:
* The term "interior" is a modern geographical designation. It wasn't commonly used in Fraser's time.
* Fraser's primary focus was on the river itself. He documented his journey along the Fraser River, naming various geographic features along the way.
* Indigenous peoples had their own names for the land. The specific names varied depending on the different nations and languages.
Therefore, while Simon Fraser is credited with exploring the interior of BC, he didn't give it a specific name.