I'd say that Xilupha is form either Mauga, Bluehill, Ostark or Vergoff, a town that is under Lady Kilka's influence rather than Lady Elanolake since Kilka is a half elf too and there might some traces of drow in her and/or in that conflict. But since Xilupha moved, who knows how far, she is good to end in any other territory. Idon't know if she would have traveled far but I'd say she has established already and made up some reputation so I don't think she could know Kess or at least not from the road, they could meet in the festival though or perhaps in the preparations for it for some prior connection.