Ceto.

Ceto (Κητώ) (Kētṓ) means 'sea monster'. She was a sea goddess in Greek myths and legends. Ceto's parents were Pontus (Πόντος) (Póntos) and Gaia (Γαῖα) (Gaîa).

Phorcys (Φόρκυς) (Phórkos) was her consort. They had children: the Gorgons (Γοργώνες) (Gorgones), the Graeae (Γραῖαι) (graîa), Echidna (Ἔχιδνα) (Ékhidna), and Ladon (Λάδωνος) (Ladonos). The Nemean lion (Νεμέος λέων) (Leo Nemeaeus) and the Sphinx (σφίγξ) (phíx) were Ceto's children, too.

Also, Ceto had several siblings.

Chimera.

Chimera was a monster in Greek legends. Her parents were Typhoeus and Echidna. Cerberus and Lernaean Hydra were relatives.

She had the head and body of a lion. Also, Chimera had a snake tail and a goat head on the back.

There are many myths and legends about this monster. Statues and paintings of Chimera were created, too.