I'm Nancy (she/her), a historical costuming enthusiast who recently remembered how fun this game was when they played it in years ago. Also a horse enthusiast (and this blends with historical costuming via daily fantasies about riding habits).
The horses under the "Song Horses" tab have song themed names (ie their name is featured either in the name or lyrics of a song), and if you want, you can have fun trying to figure out which song I'm referring to -- though I must warn you that some of the names (like Georgia) are very common for song titles or lyrics. Feel free to pm me with guesses!