Hm, so out of idle curiosity how could Jacob possibly know who Rachel is? First of all she's wearing her hood so he can't see her face, secondly she's wearing no military outfit or emblem at all, and thirdly even if he received reports how could he possibly be able to recognize one short, black haired woman he's never seen before on sight? And that's assuming he even knows what she looks like and can see her face. 

I mean, don't get me wrong notoriety is nice. But that just seems far to unlikely. The only thing I could possibly guess would be the fact that she's a tactician, but even then. Now, after she introduces herself you could provide the fountain of knowledge, that's fine, that's more realistic. A name would be far more unique and he'd have a better chance of knowing it from a report or something.