I have heard of José Feliciano. But didn’t really associate him with anything specific. The name suggests a bit middle of the road for my taste. I didn’t know he was born in 1945, in Puerto Rico, that he was blind. I hadn’t linked him with Feliz Navidad.
Nor had I linked him with this 1969 song. Hearing it on Sounds of the 60s had the rare effect of making me think ‘truly lovely’ and ‘wow’