Morgenstern, Julian's horse from the Chronicles of Amber by Roger Zelazny
Mortis, Death's Steed (Death rides a pale horse). Mortis can transform into other modes of transportation,including a pale limousine with the license plate reading "Mortis". Mortis first appears in the book, On A Pale Horse and accompanies Death in the Incarnations of Immortality series by Piers Anthony
Nana, the racehorse named for the eponymous heroine of Zola's novel Nana, and fictional winner of the Grand Prix de Paris
Thowra, a creamy-silver stallion, the main character in Silver Brumby, by Elyne Mitchell
Thunderhead, son of Flicka in the book by Mary O'Hara
Topthorn, from War Horse by Michael Morpurgo
Tornac, from Christopher Paolini's Eragon
Trojan Horse (a structure), from Virgil's Aeneid; Homer's The Odyssey; Franco Brusati's Ulysses; Hugh Gray's The Treatment of Helen of Troy; Margaret George's Helen of Troy; and Adele Geres' Troy
Arabesque, Blutch's horse in Les Tuniques Bleues, whom he has trained to fall down during battle so he can act as if he is wounded and thus survive the battles.[3][4]
Rik Drie ("Rik Three"). A horse of Nero in the story "Het Geheim van Bakkendoen" ("The Secret of Bakkendoen").[11] It turns invisible due to a serum. Nero named him "Rik Three", because "he is even greater than Rik One and Rik Two" (Cyclist champions Rik Van Steenbergen and Rik Van Looy were popularly nicknamed "Rik One" and "Rik Two", because they were active around the same time.)
Rin Sohma in the form of a horse, from Fruits Basket.
Het Rijmende Paard ("The Rhyming Horse"). He is the horse of Saint Martin of Tours on Antoon van Dyck's famous painting. In the Suske en Wiske album "Het Rijmende Paard" he is brought alive and escapes, causing the protagonists to start a search for him.[12]
Feitlebaum, the racehorse who always comes up from behind to finish first (even in a car race) in songs by Doodles Weaver (performed with Spike Jones and his City Slickers)
Galway Bay, the 'coal-black mare with a white starred chest' in the song "The Galway Farmer" by Steve Knightly of Show of Hands