Rhopaselenic

 is a gender related to butterflies and moonlight.

Etymology
"Rhopa" comes from “rhopalocera”, which is defined as a division of the order Lepidoptera that consists of all butterflies. "Selenic" comes from Selene, the Greek goddess of the moon.

Pronunciation
rOHp-uh-suh-lEEn-Ik

Definitions

 * A gender related to moonlight & butterflies. - tutelaric, 2021

Flags
The creator of the flag says that it's not based on any specific type of butterfly, however, if someone wanted to modify it to be related to a specific butterfly, they could change the outer two colors of the flag to match the butterfly they have in mind.