Oh, I never ment this to be complete (because where would you stop?), all the people you mention only ever appear in a context where you couldn't possibly mistake them for anyone else or be confused about their relationships.
Same is true when it comes to Tharn's sister and I originally didn't have her in this, but since I had to include his brother I just kind of felt bad for leaving her out, you know? So yeah, I don't believe any of those people are important enough in that sense, do you? And if so, why?