Who is This?

I'm cheekily reviving a post from last year because this puzzle is still unsolved! All suggestions very gratefully received.

I've added another cup to my lithophane collection. There's a problem, though: I don't know whom it depicts. The front of the cup has a monogram of JW and the dates 1870-1911, but I'm afraid that hasn't helped me much.
Does anyone have any idea who this might be?