Demeter (Ceres)

No Demeter was not a cereal she was a Greek goddess in Ancient Greece, She was the goddess of agriculture and harvest.

Her Roman name was Ceres, from which 'cereal' is derived.

She liked to help harvest crops.

Demeter, the Greek goddess of agriculture and harvest, has several rivals in mythology, most notably Hades, who abducted her daughter Persephone, causing Demeter great sorrow and leading to the changing seasons. Additionally, she often contended with the goddess Hera, especially regarding matters of fertility and motherhood, as both deities held significant influence over these aspects. Other agricultural deities, like Dionysus, could also be seen as rivals in the broader context of fertility and abundance.

Bringing winter to the world!

agriculture

Because, like all the Greek gods, she was essentially omnipotent, with the limitation of being submissive to Zeus.

Abundant crops and healthy grains.

Demeter, the Greek goddess of agriculture and harvest, shares similarities with several other deities across various cultures. For instance, Ceres in Roman mythology is her direct counterpart, embodying similar themes of fertility and grain. Additionally, the Egyptian goddess Isis, who is associated with agriculture and motherhood, parallels Demeter in her nurturing aspects. Other similar figures include the Sumerian goddess Inanna and the Hindu goddess Annapurna, both linked to fertility and nourishment.

Ceres is a Roman goddess, Demeter is a Greek goddess, often the two are identified with each other.

Rhea brings the sad message to Demeter that her daughter Persephone has been taken to the underworld by Hades and will have to spend part of each year there. This news devastates Demeter, the goddess of the harvest, leading her to neglect the earth, resulting in barren land and the onset of winter. Rhea's message underscores the themes of loss and the cyclical nature of life and seasons in Greek mythology.

becauseDemeter the divinity of grain thought of as a goddess and not a god?

Rhea is her mother, Cronus her father.

Demeter and Persephone were both goddesses of the earth. Gaia (Earth) through her daughter Rhea, who was the mother of Demeter and grandmother of Persephone.

Persephone, goddess of the grain (by Zeus)

Ploutos, god of wealth (by Iasion)

Philomelus/Bootes, invented the wagon and the plough. (by Iasion)

Korybas, leader of the Samothracian Korybantes (by Iasion)

Eubouleus, demi-god (by Karmanor)

Khrysothemis, demi-goddess (by Karmanor)

Despoine, mystery goddess (by Poseidon)

Areion, immortal horse (by Poseidon)

Demeter was sometimes titled Erinys Telphousia it may be assumed that she and not a Erinys the creatures:

Aithon, Phlogeus, Konabos and Phobos, fire-breathing, immortal horses which drew the chariot of the god Ares. (by Boreas)

Dragon of Ismenus, Cadmus slew and from sown teeth Spartoi grew (by Ares)

Because Mekon, a man loved by the goddess Demeter was metamorphosed into a poppy flower.

Demeter is the Greek name, the Romans identified her with Ceres.

Demeter was born, a daughter of Cronos and Rhea.

The first winter.

Demeter was called "Xanthe" (Golden/Yellow/Brown Haired). Although it may refer to the color of ripe crops.

Demeter was the daughter of Rhea and Cronus. Hades, Poseidon, and Zeus are her brothers from their union. Cronus had with Philyra sons Cheiron and the Ikhthyokentauroi, Bythos and Aphros. Demeter has six brothers.