User blog comment:Hermione Chase/"The Blood of Olympus" Expectations/@comment-24065371-20131224210401/@comment-10901795-20131228152827

kronus had 6 children, in age order: Hestia, Demeter, Hera, Hades, Poseidon, Zeus

But since they were kind of reborn when Kronus threw up 5 of them, there age order became Zeus, Posiedon, HADes, Hera, Demeter, Hestia

This explains why Hestia is called 'the first and last' and why she first apeared in the first book but was the last Olympian to be recognised as a goddess