We don't give names to black holes. I wonder what this says about how we think about them?

Even the black hole in the center of the Milky Way has no name. "Sagittarius A*" is the name of something near it, perhaps its accreation disk, but not the black hole itself.

There's an explanation involving objects needing to be observed to be named, and black holes of course don't emit (much) so can't be seen.

But, we have no difficulty naming exoplanets that have not been directly observed in EM but only deduced by radial velocity measurements of their gravity. For that matter, we've detected gravity waves from colliding black holes now, but the resulting larger black hole didn't get a name either.

What else don't we name (dark matter halos perhaps?), and what does it say about how we think about this stuff?