Please provide more context! There are many islands around the world that could be called "Wolf Island."
To answer your question, I need to know:
Which Wolf Island are you referring to? Islands with this name exist in Alaska, Canada, Croatia, India, and elsewhere.
What kind of wolves are you interested in? Are they gray wolves, red wolves, or another type?
Once you provide this information, I can help you find out how the wolves reached that specific island.