I don't know what the "sti" is for but the first one that comes to mind is Athena but there are probably dozens.
Hecate
Athena
There are actually 6 Greek Goddesses with six letter names: Hecate, Athena, Hestia, Phoebe, Themis, and Selena.
Athena
The Greek gods and goddesses did not have birthdays.
This is easy hestia goddess of hearth
Labda
Hecate
The greek goddess Athena, goddess of wisdom, arts and crafts, and war strategy. Her sacred animal is the owl and she is known to have been an advisor (and daughter) of Zeus. The city of Athens, capital of Greece is named after her.
Delphi
0-6 in 4.3 seconds (2011 STI) 13.4 quarter mile (2007 STI) .97 Lateral G turn (2015 STI) Time around Nurburgring: 7:55:04 (2011 STI) Time around top gear test track: 1:29:00 (2004 STI)
The Greek alphabet does not have the letters: J, Q, W, X, Y, and Z.