Edit 03/27/13: This list encompasses Apollodorus Library 1-3 and Epitome. As I begin to work on the Iliad, I will add the cases I find there as well.

[Original Post] I've encountered some instances in the text where siblings are listed, and then it it suggested that in fact rather than being siblings, one of the individuals was the offspring of one of the others. For example. Europa is listed as both the sister of Phoenix and his daughter, based on Apollodorus saying her father was Agenor, but others (Apollodorus doesn't say who, but it's substantiated in the Iliad) claim it was Phoenix. I have expanded the descriptions for both of these characters in an attempt to disambiguate their relationship.

Some of the children of Minos (Catreus, Deucalion, Glaucus, Androgeus, Acalle, Xenodice, Ariadne, and Phaedra) are listed as having two mothers - either Pasiphae or Crete. He does have other children by other women, but these are the offspring specifically by his wife, who is alternately Pasiphae or Crete depending on the source. Apollodorus gives it as Pasiphae, but notes that Asclepiades claims she was Crete. Do we want to include information of conflicting accounts like these, and if so how do we best present it clearly? Additionally, Crete is currently associated with event 618, "Minos marries Pasiphae and has children." This seems a little confusing.

I know there's a number of similar conflicts, and I've spoken with Greg about it at some length. At this stage I don't think we're making any significant changes, but I'm going to document the cases I find for future reference.

Edit 03/12/13: Children of Oedipus (Antigone, Eteocles, Ismene, Polynices) are born to him by his mother, Jocasta; Apollodorus makes a vague reference to another version of the tale in which the children's mother is Eurygania, who according to the source is either a daughter of Hypherphas, an alias of Jocasta, or a woman Oedipus married after Jocasta's death. She is currently listed as one of two mothers of Oedipus' children, but based on my research she's used extremely infrequently and most sources (including Apollodorus) agree it was Jocasta.

Edit 03/15/13: Callisto listed alternately as the daughter of Lycaon according to Apollodorus, Nycteus according to Asius, and Ceteus according to Pherecydes.

Elatus and Aphidas are listed with multiple mothers. Their mother is either Leanira, Meganira, or according to Eumelus, Chrysopelia.

Lycaon, is listed with multiple mothers: Meliboea and Cyllene.

Atalanta is listed as being the daughter of three fathers - Iasus, Maenalus, and Schoeneus. Additionally, Euripides attests that her husband was Hippomenes and not Melanion, as Apollodorus claims. Further, Apollodorus comments that the father of her son Parthenopaeus was either Melanion or Ares.

Idas is listed as the son of two fathers: Aphareus and Poseidon.

Aesculapius is listed as the son of two mothers: Arsinoe and Coronis.

Edit 03/19/13: Helen is listed as the daughter of two mothers, Leda and Nemesis.

Tithonus, Lampus, Clytius, Hicetaon, Priam, Hesione, Cilla and Astyoche all have three mothers - Strymo, Placia, and Leucippe.

Hecuba is the daughter of three fathers; alternately Cisseus, Dymas and Sangarius. Additionally, her mother is given as Metope, but only in the pairing of Metope with the river Sangarius. I don't think Metope is inferred or mentioned as her mother if either of the other two men are her father.

Telamon has two mothers: Endeis and Glauce, and likewise two fathers, Actaeus and Aeacus.

Edit 03/20/13: Menesthius has two fathers, Peleus and the river Sperchius.

Patroclus has three mothers: Periopis, Polymele, and Sthenele.

Adonis has three mothers: Alphesiboea, Metharme, and Smyrna. He likewise has three fathers: Cinyras, Phoenix and Thias.

Erichthonius has two mothers: Athena and Atthis.

Phineus has two fathers: Agenor and Poseidon.

Amphitrite has two mothers: Doris and Tethys, and two fathers, Nereus and Oceanus.

Erectheus has two mothers: Gaia and Zeuxippe.

Aegeus has two fathers: Pandion and Scyrius.

Edit 03/22/13: Sciron has two fathers: Pelops and Poseidon.

Hippolytus has two mothers: Antiope and Hippolyte.

Persephone has two mothers: Demeter and Styx.

Palamedes has three mothers: Clymene, Hesione and Philyra.

Agamemnon and Menelaus have two fathers: Atreus and Plisthenes.

Tydeus has two mothers: Gorge and Periboea.

Edit 03/26/13: Tenes has two fathers: Apollo and Cycnes.

Hippothous has two fathers: Lethus and Pelasgus.

Sarpedon has two mothers: Europa and Laodamia.

Briseis has two fathers: Briseus and Chryses.

Rhesus has two mothers: Calliope and Euterpe.

Tisamenus has two mothers: Erigone and Hermione.

Circe has two mothers: Perse and Perseis.

Edit 03/27/13: Pisinoe, Aglaope, and Thelxiepia have two mothers: Melpomene and Sterope.

Scylla has two fathers: Phorcus and Trienus.

Pan has two mothers: Penelope and Hybris, and two fathers: Zeus and Hermes.

Hellen has two fathers: Zeus and Deucalion.

Endymion has two fathers: Zeus and Aethlius.

Aegialia has two fathers: Adrastus and Aegialeus.

Opheltes has two mothers: Amphithea and Eurydice.

Amphitryon and Anaxo have three mothers: Astydamia, Hipponome, and Laonome.

Augeas has three fathers: Helios, Phorbas and Poseidon.

Hippomedon has two fathers: Aristomachus and Talaus.

Perieres has two fathers: Aeolus and Cynortes.