You spell Dionysos two different ways. The usual Romanization is Dionysus
according to Webster (but i thought it was Dionysius, where is that extra
'i' coming from??). But since you are talking about Greeks, the Greek
spelling given by Liddell and Scott is Delta iota omicron (alternatively
omega) nu upsilon sigma omicron sigma.

Read T.E. Lawrence's notes to his editor, prefacing t "Seven Pillars of Wisdom"
on the 6 or 7 alternative ways he spelled a favorite camel's name. (In a
nutshell, if you can read Arabic the Englished spelling doesn't matter, and if
you can't it doesn't help.)
zemedelec