The Goddess of Sand most likely refers to Din, who is credited with creating the earth in the creation story. The Temple is ancient, and Nabooru is in her twenties/thirties; there's no way it can refer to specifically Nabooru. The inner statue of the Goddess of Sand has the Triforce on one of her palms as well, a reference to the Golden Goddesses.
Nayru the Oracle and Nayru the Goddess are not the same person, although they are connected. I agree with Nayru being the Goddess of Time. Nayru's classification as a Goddess of Time is very plausible, as she is credited with creating the laws and physics of the universe; time would certainly be one of them.
It's three days later and an entirely different point; if this is construed as a double post, tell me and I'll change it.
Let me play devil's advocate for just a minute.
Zelda's Secret Ocarina is a site that documents the pre-production stages of
Ocarina of Time, and lost data within Zelda games, primarily
Ocarina of Time. Normally, I'd never use it to back up an argument. Beta Zelda material was removed for a reason, right?
However, they found a debug level of Hyrule Castle Garden that is identical to the one found in the game, save for boxes where barrels should be and a detail in Zelda's Courtyard. A few statues, the water, and the guards are missing. However, the rest of the statues are left intact, as they are in the game, and therefore, in canon.
I bring to your attention this particular monument.
We have a Triforce on the pedestal of a statue of four female figures.
If it were three, it'd be a simple statue of the Golden Goddesses. Instead, we have four.
Onto various explanations!
1. I don't think there's a Fourth Goddess, but out of all the Fourth Goddess ideas, I like the one that makes the Fourth Goddess evil. Perhaps this is a statue of the original Four Goddesses before the Fourth Goddess fell?
2. It isn't a statue of the Goddesses at all, but a statue of past Hylian queens. They are standing in pairs- the one behind is the mother of the one standing before her.
3. It isn't a statue of the Goddesses at all. The four have raised arms, palms open to the heavens. They could be some sort of Triforce bearers.
Obviously, only the first one applies to the Fourth Goddess theory. What do you guys think?