Well of course you could call him Transperceneige but that could be a little hard to pronounce for some people :D Tho it translates to Snowpiercer and that’s pretty cool IMO
I don’t know if I’m the best for horse names, but I always thought that if I had to name a horse I would do it after A Song of Ice and Fire. It just has such cool names : Volantis, Braavos, Dracarys, Hearteater, Valyria, Mantarys, Norvos, Basilisk, Starfall, Sunspear, Dragonborn, Lightbringer, Kingslayer, Asshaï, Westeros, GreyWind, Dragonknight, Wildfire, Stormborn, Silverwing, Torrhen
But you know, that’s just my heroic fantasy side talking. If you had a mare I would have told you to call her Khaleesi.
From Doctor Who, I also like Gallifrey, or you could just call him Time Lord.
Also I have a weird fascination with italian car names : Urraco, Islero, Reventón, Scaglietti, Fiorano, Murciélago, Visconti, Brigliadoro, Caimano, Gallardo
And the horse with the coolest name I know is Vindicator. Anything in -or is cool actually : Aventador, Conquistador…