"What's your horse's name?"
"Horse."
"Sophia waited for the joke, but it didn't come. "You call your horse 'Horse'?"
"He doesn't mind."
"You should give him a noble name. Like Prince or Chief or something."
"It might confuse him now."
"Trust me. Anything is better than Horse. It's like naming a dog Dog."
"I have a dog named Dog. Australian Cattle Dog." He turned, his expression utterly matter-of-fact. "Great herder."
"And your mom didn't complain?"
"My mom named him."

Sophia and Luke, Chapter 4 Sophia, p. 64 - The Longest Ride (2013)