So technically this is more of an original work than most of the stuff I post on here, but it draws from lots of different mythologies in places so I think it counts. So in vaguely chronological order I give you: Some Stuff That Has Been Taking Up My Brain Space!
She was free, a never ending wave of everything, anything. But as everything belonged to her, she could not belong to everything. She faded down till she no longer felt so rushing and fierce. Patches of her grew thin till bits of it began to disappear all together, with holes appearing like a honeycomb. For the first time she felt an inside. She was smaller than she would ever be again. And for the first time she was small enough to finally rest. Flickering down into the tiniest pinprick of life, she slept.
When she awoke she stared into the eyes of the only other she had ever seen. In her small home of belonging she peered out into the other. He was vast, and silent, and powerful in his lack of power. He simply was and was still. She had barely learned of self and others, much less danger, so her sword remained undiscovered at her side. When she reached for the other, he retreated, the first movement she had seen from him. She spoke with words, but they failed to reach him.
"He came when I retreated," she thought to herself. "Mayhap he was there all along. And how I came to be, he might also have a similar forming." And she called him Brother, and Silent, and Hidden, the first word of her tongue spoken. For still she could not reach him.
He for his part never spoke, for never would a word come from his tongue. And though he could not call to her, his eyes remained intent on her, and in his mind he called her Sister and Dayspring and Dayset, for though he glimpsed her, his eyes were too clouded save to see her beginning and end vaguely.
Though her brother neither heard nor answered her calling, her own word came back to her in a ringing of intent. Not so other as the one before her, but distinct from self. She cautiously called out, and the soft hum returned to her, springing back from the darkness where her brother called home. Fearing the emptiness left in its wake she called for the new other. He returned at her call in a bright ringing. For many sprang out of the one and in wonder she called him Helper.
Though she knew it not, in the darkness of her brother's realm the soft stillness had settled around her brother like a cloak, for he could not break out in bright trills like his sister. He accepted this for though the stillness could not call to him, her touch on his shoulder was comforting and in place, and he called her Solace and Companion and Aid.
His sister's home grew slightly, but he did not mind with the presence of his Aid. His sister had need of greater reaches, for he heard that she had found another who she called Shaper, who called her Drawn, and of two they formed one purpose. The Shaper shifted the borders of her land, for he could draw together and weave together the substance and fate of those things that be.
Of her and this her husband was swiftly born a daughter, and her mother called her That Which Fills and her father called her That Which Comes Together. We, her children's children's children often call her Is. Is undertook many endeavors, and never will cease her endeavors so long as she has feet to stand on. Bright, her mother, and Gather, her father also live. Bright lives till all grows dark, while Gather is not one of those who dies, even after nothing is left to gather.
Meanwhile the brother of Bright flinched from the growth and expansion of her kingdom, seeking an abode alone once again, save for his Aid. He found a patch of soothing night to rest in, and never minding who tended it, fell asleep from his long journey. He awaking to another outburst of light from his sister, was preparing to leave, despairing and dismayed, when the light crumbled into a dust of nothingness before his eyes in the swing of a blade.
Clothed in as deep of darkness as him, and eyes shadowed by a dark veil, one stood before him. Unlike at the beginning, she had known what it was to be driven. She knew what it was to protect. And so she sheathed not her sword up and demanded how he came hither. He stared at her, words on his lips and yet unable to leave.
Finally, he reached for his aid's hand that rested on his shoulder, and laid it on the shoulder of the one who threatened him. They met eyes and a blossoming of sisterhood bloomed between them. Then he reached and laid his hand on hers. Her eyes widened at the touch, that was empty, and soft, and did not drive her away. She called him One Who Can Coexist for she had longed for such. She grew to care greatly for him. And though he never spoke it he called her Protection, for every space he was forced to flee he knew would once again be his in time.
Though he loved his sister, his Protection was no friend of the one who had caused her to wander since her forming. He is the one called Empty, and she is the one called Unmake and Entropy, and together they made a home in the dark land, and had many children who grew up warriors all, with Silence to attend them as the Echoes attended Is in the bright land.