Ishtvan is one of Tweedle's houndmasters, as we hear Tweedle tell ✣ his sister, Seffie. He is also called Ishtvan Drynose by the Zogok the Lead Sparkhound, and also, nearly, by Tweedle.
Outside information Edit
'Ishtvan' is a common transliteration of the Hungarian given name István. Likewise, Nyiregyhaz is a (relatively) English-friendly conversion of a Hungarian city's name.