Geathian horse

We don't know the name of this thing.

But we do know where it came from. So we're using that to title the page logically. If you know a better, more precise name, tell us.

A Geathian horse was a horse found in and around the city-state of Geath on an unnamed planet. Rory Williams was surprised by their very existence, because he didn't consider that there were horses on worlds other than Earth. The relationship between Geathian horses and Earth horses, if any, was not known. (NSA: The King's Dragon)

Behind the scenes

Although the name is a demonym, the demonym is actually used within the text of Dragon. People from Geath are Geathians, so horses from there are plausibly Geathian as well.