Title: Demeter
Content:  Some of the earliest accounts of Demeter's relationships to other deities comes from Hesiod's Theogony, written c. 700 BC. In it, Demeter is described as the daughter of Cronus and Rhea. Demeter's most well-known relationship is with her daughter, Persephone, queen of the underworld. Both Hesiod and the Homeric Hymn to Demeter(2), describe Persephone as the daughter of Zeus and his older sister, Demeter, though no myths exist describing her conception or birth. The exception is a fragment of the lost Orphic theogony, which preserves part of a myth in which Zeus mates with his mother, Rhea, in the form of a snake, explaining the origin of the symbol on Hermes' staff. Their daughter 
Title: Demeter
Content:  the giver of food generally. This view is shared by British scholar Jane Ellen Harrison, who suggests that Démeter's name means Grain-Mother, instead of Earth-Mother. Wanax (wa-na-ka) was her male companion (Greek: Πάρεδρος, Paredros) in Mycenaean cult. The Arcadian cult links her to the god Poseidon, who probably substituted the male companion of the Great Goddess; Demeter may therefore be related to a Minoan Great Goddess (Cybele). An alternative Proto-Indo-European etymology comes through Potnia and Despoina, where Des- represents a derivative of PIE *dem (house, dome), and Demeter is "mother of the house" (from PIE *dems-méh₂tēr). R. S. P. Beekes rejects a Greek interpretation, but not necessarily an Indo-European one.
Title: Demeter
Content:  said to be the daughter of Demeter and Poseidon. According to Pausanias, a Thelpusian tradition said that during Demeter's search for Persephone, Poseidon pursued her. Demeter turned into a horse in order to avoid her younger brother's advances, but he turned into a stallion and mated with the goddess, resulting in the birth of the horse god Arion and a daughter "whose name they are not wont to divulge to the uninitiated". Elsewhere he says that the Phigalians assert that the offspring of Poseidon and Demeter, was not a horse but in fact Despoina, "as the Arcadians call her". In Orphic literature, Demeter seems to be the mother of the witchcraft goddess Hecate.
Title: Demeter
Content:  Demeter was frequently associated with images of the harvest, including flowers, fruit, and grain. She was also sometimes pictured with her daughter Persephone. Demeter is not generally portrayed with any of her consorts; the exception is Iasion, the youth of Crete who lay with her in a thrice-ploughed field, and was killed afterwards by a jealous Zeus with a thunderbolt. Demeter is assigned the zodiac constellation Virgo the Virgin by Marcus Manilius in his 1st century Roman work Astronomicon. In art, constellation Virgo holds Spica, a sheaf of wheat in her hand and sits beside constellation Leo the Lion. In Arcadia, she was known as "Black Demeter". She was said to have taken the form of a mare to escape the pursuit of her younger brother, Poseidon, and having been raped by him despite her disguise, dressed all in black and retreated into a cave to mourn and to purify herself. She was consequently depicted with the head of a horse in this region. A sculpture of the Black Demeter was made by Onatas.
Title: Demetrius the Fair
Content:  Demetrius was of Macedonian ancestry. He was surnamed The Fair, because he was an attractive man. He was born and raised in Macedonia. Demetrius was named after his father and was the youngest of the children of King Demetrius I of Macedon and his wife, Ptolemais. Demetrius I married Ptolemais as his fifth wife around 287 BC/286 BC in Miletus, while this was Ptolemais’ first marriage. Demetrius was the only child born into the marriage, as his father died shortly thereafter, in 283 BC. From his father's previous marriages, Demetrius had various paternal half siblings, who included king Antigonus II Gonatas, as well as Stratonice of Syria, princess and later Queen of the Seleucid Empire. Demetrius’ maternal grandfather was the first Greek-Egyptian pharaoh Ptolemy I Soter. Among his maternal aunts were Queen Arsinoe II of Egypt and among his maternal uncles were Pharaoh Ptolemy II Philadelphus and Macedonian King Ptolemy Keraunos (Keraunos was Ptolemais’ full blooded brother). Pharaoh Ptolemy III Euergetes was a maternal cousin. His paternal grandparents were Macedonian king Antigonus I Monophthalmus and Stratonice, while his paternal uncle was the general Philip.
Title: Demeter
Content:  In ancient Greek religion and mythology, Demeter (Attic: Δημήτηρ Dēmḗtēr ; Doric: Δαμάτηρ Dāmā́tēr) is the Olympian goddess of the harvest and agriculture, presiding over grains and the fertility of the earth. She is also called Deo (Δηώ). Her cult titles include Sito (Σιτώ), "she of the Grain", as the giver of food or grain, and Thesmophoros (θεσμός, thesmos: divine order, unwritten law; φόρος, phoros: bringer, bearer), "giver of customs" or "legislator", in association with the secret female-only festival called the Thesmophoria. Though Demeter is often described simply as the goddess of the harvest, she presided also over the sacred law, and the cycle of life and death. She and her daughter Persephone were the central figures of the Eleusinian Mysteries, a religious tradition that predated the Olympian pantheon, and which may have its roots in the Mycenaean period c. 1400–1200 BC. One of the most notable Homeric Hymns, the Homeric Hymn to Demeter, tells the story of Persephone's abduction by Hades and Demeter's search for her. Demeter was often considered to be the same figure as the Anatolian goddess Cybele, and she was identified with the Roman goddess Ceres.
Title: Don Demeter
Content:  Demeter was born in Oklahoma City, Oklahoma, on June 25, 1935. He was the third of four children of Lewis and Aileen Demeter. His father was a painting contractor. The family lived in Oklahoma City until Demeter was about 10, when they moved to Denver. His parents divorced about a year after the move, and Demeter returned to Oklahoma City to live with his grandparents. After his mother remarried, he lived briefly in Keene, New Hampshire, before returning to Oklahoma City to live with a foster family. His foster father, George Stevens, was a Sunday school superintendent at the Exchange Avenue Baptist 
Title: Demeter
Content:  (once from the earth, i.e. Demeter, when the plant sprouts) and once from the vine (when the fruit sprouts from the plant). Diodorus also related a version of the myth of Dionysus' destruction by the Titans ("sons of Gaia"), who boiled him, and how Demeter gathered up his remains so that he could be born a third time (Diod. iii.62). Diodorus states that Dionysus' birth from Zeus and his older sister Demeter was somewhat of a minority belief, possibly via conflation of Demeter with her daughter, as most sources state that the parents of Dionysus were Zeus and Persephone, and later Zeus and Semele. In Arcadia, a major Arcadian deity known as Despoina ("Mistress") 
Title: Demeter
Content:  Demeter's search for her daughter Persephone took her to the palace of Celeus, the King of Eleusis in Attica. She assumed the form of an old woman, and asked him for shelter. He took her in, to nurse Demophon and Triptolemus, his sons by Metanira. To reward his kindness, she planned to make Demophon immortal; she secretly anointed the boy with ambrosia and laid him in the flames of the hearth, to gradually burn away his mortal self. But Metanira walked in, saw her son in the fire and screamed in fright. Demeter abandoned the attempt. Instead, she taught Triptolemus the secrets of agriculture, and he in turn taught them to any who wished to learn them. Thus, humanity learned how to plant, grow and harvest grain. The myth has several versions; some are linked to figures such as Eleusis, Rarus and Trochilus. The Demophon element may be based on an earlier folk tale.
Title: Demeter
Content:  her in his home. When her son Philomelus invented the plow and used it to cultivate the fields, Demeter was so impressed by his good work she immortalized him in the sky by turning him into a constellation, the Boötes. Besides giving gifts to those who were welcoming to her, Demeter was also a goddess who nursed the young; all of Plemaeus's children born by his first wife died in cradle; Demeter took pity of him and reared herself his son Orthopolis. Plemaeus built a temple to her to thank her. Demeter also raised Trophonius, the prophetic son of either Apollo or Erginus.

Question: who were demeter's siblings?
Answer: Zeus.