Why The Name "Aslan Roars"?

"But who is Aslan? Do you know him?"
"Well - he knows me."
~ Eustace and Edmund (Voyage of the Dawn Treader)

Aslan, also known as The Great Lion, is a Christ figure in C.S. Lewis' Chronicles of Narnia.
He is the creator and one true king of the world of Narnia just as Jesus, the Lion of Judah, is Creator and King of our world.

When God speaks, it is like a lion roaring. Amos 3:7-8 says,
"Surely the Lord God does nothing unless He reveals His secret counsel to His servants the prophets. A lion has roared! Who will not fear? The Lord God has spoken! Who can but prophesy?"

This ministry's beginnings and continued foundation is to speak/prophesy what God is saying, thus the name Aslan Roars.

C.S. Lewis Quotes

The Lion opened his mouth...then there came a swift flash of fire...and the deepest, wildest voice they ever heard was saying: "Narnia, Narnia, Narnia, Awake. Love. Think. Speak."
~ The Magician's Nephew

"Creatures, I give you yourselves," said the strong, happy voice of Aslan. "I give you the woods, the fruit, the rivers. I give you the stars and I give you Myself."
~ The Magician's Nephew

"Look here," said Digory to Polly. "I've got to go after him – Aslan. I mean, the Lion. I must speak to him."
"Do you think we can?" said Polly. "I wouldn’t dare."
"I've got to,' said Digory. "It's about Mother. If anyone could give me something that would do her good it would be him."
~ The Magician's Nephew

Lucy: "Isn't he safe?"
Mr. Beaver: "…'Course he isn't safe. But he's good. He's the King."
~ The Lion, The Witch, And The Wardrobe