About the Sundrop Dance naming scheme

[CyrilLucifer]

I think it's just a play on words and that it doesn't have anything to do with "dropping the sun." Sundrop, as contrast to moon drop, which is generally just a poetic way of saying moonlight. So you're dancing the dance of the sun.

If I was forced to theorize anything, they're not as directly based on Mayans and their sun worship as the Ixal are, but there may be some sun reverence there, since you have the ancestral "mother" and "father" in the quests. In many cultures, the father is typically the sun, the mother the moon. My most liberal interpretation of this is, since you need to earn the recognition of their ancestors in order to dance it, you may be doing something of an ancestral-channeling dance, in who best represents the ancestor-father (the Sun) is the most intimidating.

There's a lot of possible reasons for the naming, but I feel this is a case of the simplest explanation being the correct one.