My username came from back in 2015. I went trick or treating and someone gave me a house decoration. The house decoration was an inch long green skeleton. I used the skeleton for many profile pictures, since it was green, I made my username "green". I later abandoned the green skeleton a few years later, until I found it again. So I wanted to go back to having "green" as my username, but I thought it's a bit lame now, but what mostly a dead language that I could use for my name? So I later changed my username to "green" in Latin, making it "viridis".