ok since everyone keeps asking EFDN is a thing from a story i started a while ago and revised so much ive forgotten the original meaning
in the most recent revision EFDN is basically a group/club of people so it fits
i liked the name so thats why i used it (plus, i tried doing a chat service named after it on an old version of my website, so the masto instance is basically a reincarnation of that)
it is an acronym but for words in my conlang that ive forgotten because they sound like cognates but arent:
Ens Fenel Dis Nuar