Modern Greek:
[ˈθa.ʎi.a]. If it was a truly vernacular name it would end up in two syllables as [ˈθa.ʎa], but it isn’t.
That’s Thaglia, with the gli pronounced as in Italian (palatal l).
Ancient Greek, which you didn’t ask for:
[ tʰáleːa]
Modern Greek:
[ˈθa.ʎi.a]. If it was a truly vernacular name it would end up in two syllables as [ˈθa.ʎa], but it isn’t.
That’s Thaglia, with the gli pronounced as in Italian (palatal l).
Ancient Greek, which you didn’t ask for:
[ tʰáleːa]