This comment from John Galt has the best idea for names in my opinion.

Well, I think it's a start, but there's improvement to be made there. For one thing, I don't see Autumn as being particularly associated with Earth. Autumn to me is more about the wind and storms. The beginning is still in hurricane season, and even towards the end as the weather changes, it still tends to be windy, with occasional lightning storms, rustling and sometimes igniting the dry leaves.

Spring is more about Earth in my opinion. It's when things emerge from the earth to start growing. The "earth" of Spring is fertile and has the potential for life. Possibly even a "plant" element, since "Ice" isn't really an element either (it's Water in traditional magic, and Harry has produced it with Fire in the past).

For emotions, I think the dominant one of Autumn should be Fear and Celebration. It's a time both of plenty and of anticipation, due to the coming winter. Fetches are defectors from the now-defunct Autumn court. Spring should be about Hope, since it's when life begins anew.

Abseelie and Adseelie make sense though, so I will yoink that.

We're building our city right now. Ostensibly Asheville, NC, it's really more covering the entire great smokies region of western north carolina. Someone wanted to play an Autumn Knight, and we thought it fit really well for the area For those who don't know the area, Autumn is VERY important to the economy. It's the main tourist season, and a poor leaf display means economic trouble.

We decided the Autumn Court is still around, but they're based on lurking and fear. They eventually got so good at hiding, they just vanished. Even records and memories of them are sketchy, with smudges, bookworms, stuck pages, and other things conspiring to keep them off the books.

The only concrete proof of their existence is their knight (who is a bit confused about it all), and a freeholding charter admitting the Old Things of the Mountains, under Spearfinger the Witch.