Clytemnestra in the context of "Iphigenia"

Helen (Ancient Greek: Ἑλένη, romanized: Helénē), also known as Helen of Troy, or Helen of Sparta, and in Latin as Helena, was a figure in Greek mythology said to have been the most beautiful woman in the world. She was believed to have been the daughter of Zeus by Leda or Nemesis, and the sister of Clytemnestra, Castor, Pollux, Philonoe, Phoebe and Timandra. She was first married to King Menelaus of Sparta "who became by her the father of Hermione, and, according to others, of Nicostratus also." Her subsequent marriage to Paris of Troy was the most immediate cause of the Trojan War.

Elements of her putative biography come from ancient Greek and Roman authors such as Homer, Hesiod, Euripides, Virgil and Ovid. In her youth, she was abducted by Theseus. A competition between her suitors for her hand in marriage saw Menelaus emerge victorious. All of her suitors were required to swear an oath (known as the Oath of Tyndareus) promising to provide military assistance to the winning suitor, if Helen were ever stolen from him. The obligations of the oath precipitated the Trojan War. When she married Menelaus she was still very young. In most accounts, including Homer's, Helen ultimately fell in love with Paris and willingly went to Troy with him, though there are also stories in which she was abducted.

In Greek mythology, Agamemnon (/æɡəˈmɛmnɒn/ ; Ancient Greek: Ἀγαμέμνων Agamémnōn) was a king of Mycenae who commanded the Achaeans during the Trojan War. He was the son (or grandson) of King Atreus and Queen Aerope, the brother of Menelaus, the husband of Clytemnestra, and the father of Iphigenia, Iphianassa, Electra, Laodike, Orestes and Chrysothemis. Legends make him the king of Mycenae or Argos, thought to be different names for the same area. Agamemnon was killed upon his return from Troy by Clytemnestra, or in an older version of the story, by Clytemnestra's lover Aegisthus.

In Greek mythology, Cassandra, also spelled Kassandra or Casandra, (/kəˈsændrə/; Ancient Greek: Κασ(σ)άνδρα, pronounced [kas:ándra], or referred to as Alexandra; Ἀλεξάνδρα) was a Trojan priestess dedicated to the god Apollo and fated by him to utter true prophecies, but never be believed. Cassandra lived through the Trojan War and survived the sack of the city, but was murdered by Clytemnestra and Aegisthus when Agamemnon brought her to Mycenae as a pallake.

In contemporary usage, her name is employed as a rhetorical device to indicate a person whose accurate predictions, generally of impending disaster, are not believed.

In Greek mythology, Orestes or Orestis (/ɒˈrɛstiːz/; Ancient Greek: Ὀρέστης [oréstɛːs]) was the son of Agamemnon and Clytemnestra, and the brother of Electra and Iphigenia. He was also known by the patronymic Agamemnonides (Ἀγαμεμνονίδης), meaning "son of Agamemnon." He is the subject of several Ancient Greek plays and of various myths connected with his madness, revenge, and purification, which retain obscure threads of much older works. In particular Orestes plays a main role in Aeschylus' Oresteia.

In Greek mythology, Leda (/ˈliːdə, ˈleɪ-/; Ancient Greek: Λήδα [lɛ́ːdaː]), also rendered Lede, was an Aetolian princess who became queen consort of Sparta through her marriage to King Tyndareus. Zeus fell in love with Leda, and to avoid his wife Hera's jealousy, seduced her while disguised as a swan. Leda was named as the mother of four famous children in Greek mythology: Helen of Troy, Clytemnestra, and the twins Castor and Pollux. Leda and the Swan was a popular motif in the visual arts, particularly during the Renaissance.

Castor and Pollux (or Polydeuces) are twin half-brothers in Greek and Roman mythology, known together as the Dioscuri or Dioskouroi.

Their mother was Leda, but they had different fathers; Castor was the mortal son of Tyndareus, the king of Sparta, while Pollux was the divine son of Zeus, who seduced Leda in the guise of a swan. The pair are thus an example of heteropaternal superfecundation. Though accounts of their birth are varied, they are sometimes said to have been born from an egg, along with their twin sisters Helen of Troy and Clytemnestra.

In Greek mythology, there were two women known as Philonoe /fɪˈloʊnoʊˌiː/ (Ancient Greek: Φιλονόη) or Phylonoe (Φυλονόη):

• Philonoe, a Spartan princess as the daughter of King Tyndareus and Leda, daughter of King Thestius of Pleuron. She was the sister of Castor and Pollux, Helen, Clytemnestra, Timandra and Phoebe. Artemis made her immortal.
• Philonoe, daughter of Iobates and first wife of Bellerophon by whom, she became the mother of Isander (Peisander), Hippolochus and Laodamia (Deidamia or Hippodamia). Philonoe was the sister of Stheneboea who loved Bellerophon more than her current husband, King Proetus of Argos. She was promised to Bellerophon after he vanquished the Chimera, the Amazons, and more tasks. Bellerophon was given half the kingdom as well as Philonoe's hand in marriage. She was also known under several other names: Alkimedousa or Cassandra, Anticleia, or Pasandra.

In Greek mythology, Phoebe (/ˈfiːbi/ FEE-bee; Ancient Greek: Φοίβη, romanized: Phoíbē, lit. 'bright, shining') is the name or epithet of the following characters:

• Phoebe, one of the twelve Titans, sister-wife of Coeus and mother of Leto and Asteria.
• Phoebe, daughter of Leucippus.
• Phoebe, a hamadryad who became one of King Danaus's many wives or concubines and possible mother of some of these Danaïdes: Hippodamia, Rhodia, Cleopatra, Asteria, Glauce, Hippomedusa, Gorge, Iphimedusa and Rhode. Apollodorus only identified these daughters of Danaus by Phoebe and Atlantia (another hamadryad), not specifying who was the daughter of the other. These ten women joined the sons of Aegyptus who were begotten by Eurryroe, traditionally seen as an Arabian woman, a naiad, daughter of Nilus (the Nile) and a sister of Europa. Later on, these princesses slew their cousin-husbands during their wedding night. According to Hippostratus, Danaus had all of his progeny by a single woman, Europe, daughter of the river-god Nilus. In some accounts, he married his cousin Melia, daughter of Agenor, king of Tyre. Other classic poets give a number of mothers to the sons of Aegyptus and the daughters of Danaus. Argyphia, Tyria, the naiad Caliadne, Gorgo and Hephaestine are also given as mothers of the sons of Aegyptos. According to Apollodorus twelve of whom were born to the naiad Polyxo; six to Pieria; two to Elephantis; four to Queen Europa; ten to the hamadryad nymphs Atlanteia and Phoebe; seven to an Aethiopian woman; three to Memphis; two to Herse and lastly four to Crino.
• Phoebe, one of the Heliades.
• Phoebe, a Spartan princess who was the daughter of King Tyndareus and Leda, daughter of King Thestius of Pleuron. She was the (half-)sister of Castor and Pollux, Helen, Clytemnestra, Timandra and Philonoe.
• Phoebe, one of the Amazons who fought against Heracles.
• Phoebe, an epithet of Artemis, also shared by Selene.

Also, Phoebe (crater) on Saturn's small moon Janus is named after Phoebe of Messenia.