Cronus (Earth-616)

Gaea (mother/paternal aunt)
The Cyclopes, the Gods of Earth, the Hecatcheiroi, and the Titans (brothers and sisters)
Atum (maternal half-brother)
Thor (maternal half-brother)
Frey (maternal half-brother)
Freya (maternal half-sister)
Ninmu (maternal half-sister)
Leir (maternal half-brother)
Typhon (maternal half-brother)
Delphyne (maternal half-sister, deceased)
Chthon, Set, other Elder Gods (uncles and aunts)
And their offspring (cousins)
Rhea (sister/wife)
Zeus (son)
Neptune (son)
Pluto (son)
Hera (daughter/daughter-in-law)
Hestia (daughter)
Demeter (daughter)
Cerberus (half-nephew)
Ladon, Chimera, Orthrus (half-nephews, deceased)
Hydra, Phaea, Sphinx (half-nieces, deceased)
Persephone (granddaughter/daughter-in-law)
Apollo (grandson)
Ares (grandson)
Hephaestus (grandson)
Hebe (granddaughter)
Artemis (granddaughter)
Athena (granddaughter)
Dionysus (grandson)
Helen of Troy (granddaughter)
Hermes (grandson)
Venus (granddaughter)
Hercules (grandson)
Macaria (great-granddaughter, deceased)
Alexiares, Anicetus (great-grandsons, deceased)
Telephus (great-grandson, deceased)
Hyllus (great-grandson, deceased)
Ctessipus (great-grandson, deceased)
Lamus (great-grandson, deceased)
Cleodaius (great-grandson, deceased)
Tlepolemus (great-grandson, deceased)
Scythes, Gelonus, Agathyrsus (great-grandsons, deceased)
Celtus (great-grandson, deceased)
Fifty unnamed great-grandsons (all deceased)
Hylus (foster great-grandson, deceased)