I've created one of those ye olde Pinterest Name Generators but for Rain World Ancients, as their structure is pretty straightforward. If this gets enough likes, I'll do one for iterators too!
Seeing how popular the Ancient name generator was, as promised: Here's the iterator name versions!
This one was a bit more complicated because of the less rigid structure and the use of adjectives and numbers interchangeably. so I've provided alternate versions, in case you ended up with "nine pacifism", which doesn't make sense. Thus: You have Nine Acts of Pacifism which rolls off the tongue way better
Feel free to add and modify further, and change to plural/singular forms if some stuff doesn't make sense.