In my view 'gentry' is insufficient as a descriptor. Whilst all the down are ladies, only 4 of the across are lords (and one of these is described as 'Earl'). At best, rather messy.
Equally, the inclusion of just one Tragedy among all the Histories seems to me pretty shoddy.
Reluctantly, I accept BONA, just as I accept this to be a badly managed theme - getting far too common. I used to rely on The Spectator for well constructed puzzles - no more.