“What about “B-612”? Or maybe you could call it “Besixdouze”?”
“Yes.” He nodded in answer. No hesitation.
“You know it?”
“It’s a planet, isn’t it? But there’s no-one there.”
I was silent for a moment. That’s right. It’s a planet. Of course it is.
“I see...so there’s no-one there. But I think...I might know your true name now.”’
B-612 was the name of an asteroid that orbited the solar system. It was not remarkable in any way, save for the fact that it had been discovered by a Japanese national. It would hardly be included in the common knowledge that the Holy Grail bestowed upon Servants. But that asteroid was named for a novella from a foreign country, and the title of that novella was “The Little Prince”.
Fate/Requiem, Volume 1, Chapter 1