Where are all of the male Keepers of the Moon?

[Velox]

Otherwise, the're relegated to nameless background npcs: Lominsa Calamity salvager, crystal brave member, that drunk in buscaroon druthers.

Or evil people: Couerl King and the guy in a certain quest

If I recall correctly, the calamity salvager and the drunk guy in Buscarrons are bother Seekers.
The only 2 Keeper NPCs are King Poach and the unnamed Crystal Brave guy that shows up in Old Gridania for that one quest and never seen again.

Given that male miqo'te are less common than females anyway, the "wanderers" lifestyle for Keepers makes them especially rare, even more so than Seekers. The number of NPCs seems to confirm the lore.