> There are many versions of the name in ancient Greek.
To be precise:
East Greek
Arc-Cypr: Posoida:n
Aeolic: Poteida:n- (Thess) Poteidao:n (Boeot) Poseida:n-
(Lesbos)
[Homer: Poseida:o:n]
Ionic: Poseideo:n
Attic: Poseido:n
West Greek
N-West: Poseida:n-
Doric Pohoida:n- (Laconian) Poteida:n (Dephi/Corinth)
Poteida:o:n (also Corinth)
Islands: Poteida:n (Crete, Cos, Rhodes)
Note that these variations appear to be regional, cutting across the usual
dialect boundaries.
Peter
The first element usually appears as <potei->, <poti(:)-> or <posei->, and
the second is <-da(:)o:n> or <de(:)o:n> (or _contracted_ <-do:n> or <-da:n>)
for earlier <-da:wo:n> (the most archaic form).