They're usually named for their home world as well. Klingons are the exception in that their home world used to be Kling, and was then renamed later.
It's basically the equivalent of Earthlings.
If there are motherboards and daughterboards, are there fatherboards and sonboards?
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What happened to Kbin.Social?
How do you ask for a haircut?
Why are spirit mediums treated as fake, when they are a very real thing?
What would inorganic species call themselves?
Why is "Dear X" considered more formal than "To X" in e-mail/writing?
How do the Doctor's enemies keep track of which Doctor is which?
How long does a wand last?
What caused the change in electronic terminology?
Why cut/bulk in cycles instead of doing it all in one go?
How much of a TARDIS is essential to its function?
Was the Federation right to grandfather in Earth's laws against genetic modification?
Why don't mages use subconscious magic when they get their wands?
Why doesn't the SGC upgrade the dialling computers?
What's the food like on your world?
Why does the OSS use children as spies?
Why does anyone even live in the cities?
Why doesn't Superman learn to use magic?
Was the USS Discovery upgraded completely, or does it still keep its original technology?
That seems like it would only work if you've the one species. Multiple species would be confusing.
Humans and martians would both be solarians, for example.