Derpy Hooves, Octavia, Doctor Whoof, Lyra, Trixie, and Leroy Wingkins as colts/mares! Le gasp!
Stoneface is the name the animators attributed to Derpy before we started calling her that-it seems manlier somehow.
There's a kid in my class named Octavius, so that is mildly creepy but what else would you call him?
Doctoress doesn't make any sense, I know.
Trygve sounds like Trixie, There ya go.