It seems to me there should be a superhero with this condition, dark-skinned and raven-haired, Indian or indigenous American perhaps, with one sparkling blue eye (the other brown) and a streaming silver forelock. She is deaf and speaks in sign language, which is shown as word balloons issuing from her hands; her superpowers are the result, somehow, of a botched attempt to cure the deafness. She could be called the Warden.
Waardenburg's also occurs in ferrets, though I understand it's hard to tell because ferrets don't hear very well to begin with.
In other news, for the second chapter of this thing I'm writing that seems to be a novel, I feel the need to do research on the daily life of Bulgarian peasants in the late eighteenth century. My dour German vampire hunter is traveling from his home country to a little village in the Rhodope Mountains, a distance of approximately a thousand miles, in about 1797, so I could also use some eastern European travel narratives from around that time. Who knows anything about any of that? What books should I read?