Even though some orchid taxonomists have reduced Aa from a separate genus to
simply a member of Altensteinia

That is what I read some years ago.

most taxonomists accept it as a valid genus.

Nice to know that it is still there.

Some believe that it was contrived to occur first in a generic list

That's the story I read.

Other families also have unusual names, such as the wasp Lala palusa or the
clam Abra cadabara

I hadn't heard of those, but there are plenty of others.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)