I happened upon facts about the names of Underwing moths recently. After googling more, I found there is already an iNaturalist Forum Thread on the topic. Enjoy!
https://forum.inaturalist.org/t/moths-in-the-catocala-genus-have-interesting-names/36805
From https://www.stcnature.org/good-natured/underwings-2/
Long ago the Swedish taxonomist Carl Linnaeus came up with the idea of naming underwings using a theme of women and relationships. He gave us the names of the European species C. nupta, (“marriage”) C. pacta (“agreement”) and C. sponsa (“wife”). Other scientists followed suit, and today we have names like the girlfriend, darling, sweetheart and betrothed; the bride, once-married and old wife; and the tearful, gloomy, inconsolable and widow underwings.