The 3rd/7th son

[madamepudifoot]

No: HPFGUIDX 88537

I have heard people mention that Ron is perhaps the "Seventh Son" -
thereby serving as a protector of good, while being tormented/tempted
by evil. However, I saw a side note during research that in India the
attrubutes of the 7th son are instead applied to the 3rd son - in this
case Percy. Could this be a connection about Percy that JKR's put in?
It seems that Ron is always conspicuously absent during the key
conflicts of the book (see below), and I find that extremely curious.
What does that say about his future roles, and how does that tie in
with his siblings?

- PS/SS: knocked out during the wizards chess, misses Harry fighting
Quirrel - his brave moment of sacrifice
- CoS: wall falls between he and Harry, he is left behind with
Lockhart, misses Harry fighting Tom Riddle - his brave moment is his
wand backfiring on Lockhart
- PoA: gets knocked out when Pettigrew escapes, Hermione and Harry go
on to rescue Sirius and Buckbeak - his brave moment is chaining
himself to Pettigrew and trying to get him when he transforms
- GoF: gone in spirit while harry fights the dragon in the first task,
is the person harry has to save in the second, watching the match
while harry finishes the 3rd task and goes to confront Voldemort again
- OoP: addled by the brains in the MoM and misses the battle between
the DE's and the Order, as well as actually seeing Voldy appear in the MoM

Not sure what these mean, but they strike me as significant when he is
so close to Harry.