Gaia

Gaia is the titan personifying Earth and these are her offspring as related in various myths. Some are related consistently, some are mentioned only in minor variants of myths, and others are related in variants that are considered to reflect a confusion of the subject or association.
Through parthenogenesis
1.Uranus
2.Pontus
3.Ourea
With Uranus
1.Cyclopes
      1.Arges
      2.Brontes
      3.Steropes
2.Hecatonchires
    1.Briareus
    2.Cottus
    3.Gyes
3.Titans
    1.Coeus
    2.Crius
    3.Cronus
    4.Hyperion
    5.Iapetus
    6.Mnemosyne
    7.Oceanus
    8.Phoebe
    9.Rhea
    10.Tethys
    11.Theia
    12.Themis
4.Gigantes*
5.Erinyes*
6.Meliae*
7.Elder Muses
    1.Mneme
    2.Melete
    3.Aoide
Some say that children marked with a * were born from Uranus' blood when Cronus defeated him.
With Pontus
1.Ceto
2.Phorcys
3.Eurybia
4.Nereus
5.Thaumas
With Poseidon
1.Antaeus
2.Charybdis
With Tartarus
1.Typhon
2.Echidna (more commonly held to be child of Phorcys and Ceto)
3.Campe (presumably)
With Zeus
1.Manes
With Hephaestus
1.Erichthonius of Athens
With Aether
1.Aergia
Unknown father or through parthenogenesis
1.Pheme
2.Cecrops
3.Python