What to name a black male kitten?

He's ten weeks old and we got him today. He's very playful and spunky. But also sweet and loveable. He's all black with the exception of a tiny white line going down his chest. We don't know what to name him. I want to name him moo. My brother wants to name him blackjack. My sister wants to name him Kitty (she's three). ha ha. Help?