(disclaimer: I have the barest bones idea of what the Endless are or their personalities, so this is just a quick blub of something I thought of at Work)
So! The JLA have just had an encounter with a member of the Endless, and called in Constantine to explain what exactly they are.
"Okay, so it's like this. Before Existence, before The Universe itself, the Personification of Time had a group of Children. These Children each Represent an Aspect of the Universe, and they are as Immortal as Immortal can get." Constantine explained.
"These children are called the Endless. They are, Dream, Destiny, Despair, Desire, Delirium, Destruction, Death, and Danny."
"...Danny?"
"Oh yeah, Danny's a cool guy. He was adopted later on by Time Itself, and he represents Balance. But that's not a word that starts with D so he just goes by his Mortal Name, Danny, to fit in."