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Not sure if Neferu's family has names yet. However, this story takes place a little over 2 years from the end of Adastra. Considering what happened, I'd be shocked if the rest of the Galaxis doesn't know what happened and how the human Marco foiled the Omorfan's chaos plans (the video of Neferu getting kicked in the balls went viral apparently so I'm sure Humans are a topic of discussion).
To me the real question is: Just how much about humans is know?
I would think that Amicus would have taken great care to keep Earth's location unknown and have pretty strict locks on the data COM downloaded from Earth's nexus/internet (even having made nexus on our own is highly suggestive of how technologically advance we could be since we are known to be abandoned).
The Parents hid that information about Earth until Amicus needed a pet which suggests they are being fairly protective of Earth too (for now). Also, since they are getting updates about events on Earth (though they don't explain how) and Neferu is present to hear them I'm sure he's passed on some information. Heck, he got Marco Khemian citizenship and I'm sure even he had to provide some basic information (age, race, species, sex, etc...) about Marco to do that.