Seventh Son stuff

[corinthum]

<snip discussion of whether Seventh Son needs its own category>

I think the problem with Seventh Son is that it means different things 
in different contexts.  It started, and its namesake derives from, Seer!
Ron arguments stating that stating that IF the Weasly age gap could be 
explained by a missing child, then that would connect Ron to a Seer 
stereotype (these posts are all in Seers and Ron now).  But it's often 
used to simply refer to the idea that there IS a missing Weasly child.  
This in turn is often offered as support for Imperious!Arthur.  

So where would a Seventh Son category go?  Seers? Weasleys? Ron?  
Arthur and/or Molly?

-Kelly