Actually, this guy does have a name! But I didn't want to waste any words introducing him since this is a drabble. He is Brandir, and a younger version of him shows up in a story I wrote. (But I did have to make up my own character since Tolkien tells us about so few rangers.)
It never occurred to me until I was writing this that poor Boromir was wandering around asking a bunch of non-Sindarin speakers for Imladris. That probably didn't help.