My last name is Yū
It means excellence and it means gentleness.
It means permanence (maybe a stretch but for the sense of eternally recurring/can’t get rid of) and it means brave.
After my great-great-great-great-etc. grandfathers’ enlightenment in the bosom of Ryōkan they took Yū for our family name to aspire to these virtues.
It certainly sounds cooler than “phthiraptera,” which for one thing, other than being a real mouthful of consonants, makes a BIG DEAL about our being “wing-less.” A LOT of creatures are wing-less, but you don’t hear us calling a lion “big wing-less cat” do you?
“Ptheir” the word for Louse has been linked to the verb “ptheirō” which means to ruin or destroy, although they say that’s a dubious folktale-type correlation
but in the end
there are some things we hope
we can destroy,
No?