Oh. Dang. I see I missed the boat. Is it too late to reconsider and leave "Family" out of Brick Wall location categories? As you said & Leigh agreed to - Australia Brick Walls (not Australia Family Brick Walls), with top-level being Category:Brick Walls (which can be sub-cat to Family Brick Walls and vice versa).
I think that including “Family” in category names for Brick Walls by location isn’t logical & that the system of location categories for brick walls should omit “Family” ... e.g., Category:Georgia Brick Walls would include any profile with its brick wall in Georgia, and Category:Georgia Family Brick Walls would be for any brick wall profile with a LNAB of Georgia. With the top-level categories for by name being Family Brick Walls and by location being just Brick Walls.