Yes, as demonstrated in the following Latin words:
Quia, quod- because
Qui, quae, quod (pronouns)
Quot- how many
Queror- to ask
Primusque- and first
Quattuor- four
There is no Q in the ancient greek alphabet. There was a qoppa, but it was an allophone for kappa - see http://en.wikipedia.org/wiki/Qoppa
W
Q isn't a number in Roman Numerals, but if you mean "What is q in the Roman Alphabet?", then I don't know.
There are no words in Greek that start with q but some have q in them
There's no letter Q in the Greek alphabet.
If You are talking about greek an roman gods, it is roman.
There are no greek god/goddesses starting with Q.
The Roman is Nereus; the Greek is Νηρευς
No.....
No
Apollo is Greek god not Roman.
Hephaestus is a Greek god not Roman.
Pegasus is both Greek and Roman.