Archimedes .
archimedes a famous greek inventor invented pi
Archimedes, Thales, Hero of Alexandria etc etc
Archimedes
The greek alphabet was developed by the Ancient Greeks, we do not know who actually invented it.
There are several Greek cities with S as first letter. To name some we start Serres capital city of Prefacture Serrae, Sami port city of Kefallonia and of course the most famous ancient greek city of Sparta.
AthenaAphroditeAresAchillesAjax
Olympus
There's no letter Q in the Greek alphabet.
Epsilon Eta
hi
I suppose this is a matter of opinion, but Daedalus is widely recognized as the best inventor of Greek mythology.
There are no greek god/goddesses starting with Q.