It's kinda just one of things I've always known but both place names and surnames with a "z" in them may not be what you think, and why it might be hard to find them in the Scottish records if the recorder was spelling as it sounds
name and place = Dalziel = "Dal eel" (edit: or Dee - Yell, ref comments)
name = Menzies = "Ming Us"
Place = Finzean = "Fing-an"
there is likely more, please add