Mine is "guinea pig" originating in andes (not guinea) and them being not-a-pig type, whole thing is just wrong.
There are (oh so ironically) so many to choose from in Astronomy.
Planet for example, or Asteroid...
But seriously, it's in their name, that they name things, which, as the name's typically used, encompasses so much more... They name themselves as that which names stars, and they cannot even get naming themselves right...
Misnomers so normalised, many people don't even realise.
Nommy irony of astronomy.