The white stallion is Strider (the father) and the brown male foal is Elendil (his son). Yes, I know Elendil is Isildur's father and not Aragorn's son, but I thought the names fit!
I call Strider by many names, including:
Aragorn
Elessar
Elfstone
Dunedan
Edhelharn
Estel
Thorongil
King
Wingfoot
When I refer to both I call them Dunedain. Lol
Yeah... I'm not at ALL a fan of The Lord of the Rings, am I? XP