
It wouldn't be hard to imagine some Duskwights left the Shroud to live somewhere else. Factors like the Woodwrath (the Elementals hating you and setting the whole forest against you) or Gridania's rampant xenophobia are good reasons to leave that cursed wood and go live somewhere else. Adopting an irregular naming convention can also be justified as a form to differentiate themselves from those elezen who come that place or Ishgard.