Generally speaking, the births of descendants of QV are generally noted as such (or trivially determinable as such).  The birth announcements can not, obviously "rank" any order of succession as it is constantly in a state of flux.   But the descendants are determinable, and generally noted as such by reliable sources (births in The Times should be acceptable?)  Lastly - the idea is to keep this from becoming an en-dash v. em-dash v. hyphen v. proportional dash v. whatever ArbCom nightmare as quickly as possible.  Life is too short to waste on debates which end being of less than even academic significance IMO.  Cheers.  BTW,  makes specific reference to all male lines descended from QV, making this a "notable category" per se (using a common name for the family).   We do not even have to say more.