Yes that looks exactly like Yoda from Star Wars, complete with "Jedi" robes.

The image was part of a blog post from the British Library on 10 facts of medieval monsters, highlighting a new book that takes a look at illuminated manuscripts from the medieval times.

So where did the image of "Yoda" come from?  Did an alien from a long time ago and a galaxy far away visit the monks who were charged with creating the manuscripts? Was it an editorial comment on a fellow brother?  Or was it just for fun? One may never know.