I recently started reading more of the fragments of the Hesiodic Catalogue of Women. In doing so, I came across the mess that is the parentage of Deucalion.
Schol. Ad Hom. Od. 2.2 hypothesis
“Deukaliôn, in whose time the deluge happened, was the son of Prometheus and his mother—according to most authors—was Klymenê. But Hesiod says that his mother was Pronoê and Akousilaos claims that it was Hesione, the daughter of Okeanos and Prometheus. He married Pyrra who was the daughter of Epimêtheus and Pandôra the one who was given by Epimetheus in exchange for fire. Deukalion had two daughters, Prôtogeneia and Melantheia, and two sons, Ampiktuôn and Hellen, whom others say was actually an offspring of Zeus, but in truth he was Deucalion’s”.
Δευκαλίων, ἐφ’ οὗ ὁ κατακλυσμὸς γέγονε, Προμηθέως μὲν ἦν υἱὸς, μητρὸς δὲ, ὡς οἱ πλεῖστοι λέγουσι, Κλυμένης, ὡς δὲ ῾Ησίοδος Προνοής, ὡς δὲ ᾿Ακουσίλαος ῾Ησιόνης τῆς ᾿Ωκεανοῦ καὶ Προμηθέως. ἔγημε δὲ Πύρραν τὴν ᾿Επιμηθέως καὶ Πανδώρας τῆς ἀντὶ τοῦ πυρὸς δοθείσης τῷ ᾿Επιμηθεῖ εἰς γυναῖκα. γίνονται δὲ τῷ Δευκαλίωνι θυγατέρες μὲν δύο Πρωτογένεια καὶ Μελάνθεια, υἱοὶ δὲ ᾿Αμφικτύων καὶ ῞Ελλην. οἱ δὲ λέγουσιν ὅτι ῞Ελλην γόνῳ μὲν ἦν Διὸς, λόγῳ δὲ Δευκαλίωνος. ἐξ οὗ ῞Ελληνος Αἴολος πατὴρ Κρηθέως.
This story is a bit strange but repeats the typical connection between man and Prometheus. Here, however, mortal man is descended from Prometheus via Deucalion. He married his cousin, which was not all that uncommon, and the rest of the story proceeds somewhat as is typical (leading to the birth of Hellen, the origin of the ethnonym Hellenes).