India and Quebec - International Signal Marine Concordance

What in the world is a conceptual congruency?  Basically the international maritime flags pair on goofy kind of conceptual level.  For instance the flags for R and J are called Romeo and Juliet.  The flags F and V are named after ballroom dances.

For the signal flags for the letters I and Q, they are named after large land areas, India and Quebec.  Like many nations they are both deeply connected the English speaking world, yet have maintained their own unique and original identity.