HEKATE (or Hecate) was the goddess of magic, witchcraft, the night, moon, ghosts and necromancy. She was the only child of the Titans Perseus and Asteria from whom she received her power over heaven, earth, and sea.
Hecate assisted Demeter in her search for Persephone, guiding her through the night with flaming torches. After the mother-daughter reunion became she Persephone’s minister and companion in Hades.
Two metamorphosis myths describe the origins of her animal familiars: the black she-dog and the polecat (a mustelid house pet kept to hunt vermin). The bitch was originally the Trojan Queen Hekabe, who leapt into the sea after the fall of Troy and was transformed by the goddess into her familiar. The polecat was originally the witch Gale who was transformed into the beast to punish her for her incontinence. Other say it was Galinthias, the nurse of Alkmene, transformed by the angry Eileithyia, but received by Hecate as her animal.
Hecate was usually depicted in Greek vase painting as a woman holding twin torches. Sometimes she was dressed in a knee-length maiden’s skirt and hunting boots, much like Artemis. In statuary Hecate was often depicted in triple form as a goddess of crossroads.
Hecate was identified with a number of other goddesses, including Artemis and Selene (Moon), the Arkadian Despoine, the sea-goddess Krataeis, the goddess of the Taurian Khersonese (of Skythia), the Kolkhian Perseis, and Argive Iphigeneia, the Thracian goddesses Bendis and Kotys, Euboian Maira (the dog-star), Eleusinian Daeira and the Boiotian Nymphe Herkyna.
Hecate was an ancient goddess, most often shown holding two torches or a key and in later periods depicted in triple form. She was variously associated with crossroads, entrance-ways, fire, light, the Moon, magic, witchcraft, knowledge of herbs and poisonous plants, necromancy, and sorcery.
She had rulership over earth, sea and sky, as well as a more universal role as Saviour (Soteira), Mother of Angels and the Cosmic World Soul. She was one of the main deities worshiped in Athenian households as a protective goddess and one who bestowed prosperity and daily blessings on the family.
Hecate may have originated among the Carians of Anatolia, where variants of her name are found as names given to children. William Berg observes, “Since children are not called after spooks, it is safe to assume that Carian theophoric names involving hekat- refer to a major deity free from the dark and unsavoury ties to the underworld and to witchcraft associated with the Hecate of classical Athens.” She also closely parallels the Roman goddess Trivia, with whom she was identified in Rome.
Hecate’s imediate family tree is like this:
Gaia is Hecate’s mother and father were Asteria & Perses and Hecate’s great great was Gaia (Goddess of the Earth). My Goddess Nyx and they are both related to Gaia so you can say they are related.
Heres what the encyclopedia said about Hecate:
HE′CATE (Hekatê), a mysterious divinity, who, according to the most common tradition, was a daughter of Persaeus or Perses and Asteria, whence she is called Perseis. (Apollod. i. 2. § 4; Apollon. Rhod. iii. 478.) Others describe her as a daughter of Zeus and Demeter, and state that she was sent out by her father in search of Persephone (Schol. ad Tleocrit. ii. 12); others again make her a daughter of Zeus either by Pheraea or by Hera (Tzetz. ad Lyc. 1175; Schol. ad Theocrit. ii. 36) ; and others, lastly, say that she was a daughter of Leto or Tartarus. (Procl. in Plat. Cratyl. p. 112 ; Orph.Argon. 975.) Homer does not mention her. According to the most genuine traditions, she appears to have been an ancient Thracian divinity, and a Titan, who, from the time of the Titans, ruled in heaven, on the earth, and in the sea, who bestowed on mortals wealth, victory, wisdom, good luck to sailors and hunters, and prosperity to youth and to the flocks of cattle; but all these blessings might at the same time be withheld by her, if mortals did not deserve them. She was the only one among the Titans who retained this power under the rule of Zeus, and she was honored by all the immortal gods.