Hellenic Pronunciation for the Gods
It is likely, like me, you grew up without an education in Classical (or Modern for that matter) Greek. You might have read “Hecate” and read it as “Heh-KATE” or, at best, “Heh-kuh-TEE” (a habit which I fear I might take to the grave). So hopefully you will also find this selection of pronunciation from HellenicGods.org interesting. I recommend reading their full article. In particular was the use of the diphthongs - where the tip of the tongue meets and presses flat against the roof of the mouth right behind the teeth before releasing. It makes a sound that is something between a D and a Th. This is common in Indian languages, like Punjabi, where I became familiar with it.
Ækáti - (Hecate or Hekate; Gr. Ἑκάτη, ΕΚΑΤΗ) Pronounced: æ-KAH-tee. or eh-KAH-tee.
Ærmís (Hermes; Gr. Ἑρμῆς, ΕΡΜΗΣ) Pronounced: ayr-MEES, the ‘H’ is silent; the ‘R’ is rolled slightly such that it almost sounds like the name has three syllables.
Æstía (Hestia; Gr. Ἑστία, ΕΣΤΙΑ) Pronounced: æs-TEE-ah.
Aphrodíti (Aphrodite; Gr. Ἀφροδίτη, ΑΦΡΟΔΙΤΗ) Pronunciation: ah-froh-DEE-tee, roll the ‘r’ slightly; the d (dǽlta) is pronounced like the soft th in this, not like the hard th in theory
Apóllohn - (Apollo; Gr. Ἀπόλλων, ΑΠΟΛΛΩΝ) Pronounced ah-POH-lohn.
Áris - (Ares; Gr. Άρης, ΑΡΗΣ) Pronunciation: AH-rees
Ártæmis (Artemis; Gr. Ἄρτεμις, ΑΡΤΕΜΙΣ) Pronunciation: AHR-tay-mees
Athiná (Athena; Gr. Ἀθηνᾶ, ΑΘΗΝΑ) Pronunciation: ah-thee-NAH, the accent on the final syllable, or not accenting any syllable.
Daimohn (Gr. δαίμων, ΔΑΙΜΩΝ) Pronounced: DAY-mohn, the D sounding like the th in thee (not like the th in thesis).
Dimítir (Demeter or Demetra; Gr. Δημήτηρ, ΔΗΜΗΤΗΡ) When enunciating the name Dimítir, the D (delta) is pronounced like the soft th in this, not like the hard th in theory: dee-MEE-teer, with the accent on the second syllable.
Diónysos - (Dionysus; Gr. Διόνυσος, ΔΙΟΝΥΣΟΣ) The D in Diónysos is pronounced like the th in thee (not like the th in thesis). Pronounced: dee-OH-nee-sohs.
Ílios - (Helios; Gr. Ἥλιος, ΗΛΙΟΣ) Pronounced: EE-lee-ohs.
Íphaistos (Hephaestus; Gr. Ἥφαιστος, ΗΦΑΙΣΤΟΣ) Pronounced: EE-fays-tohs, with the accent on the first syllable; there is no ‘H.’
Íra (Hera; Gr. Ήρα, ΗΡΑ) Pronounced: EE-rah. The ‘H’ (Íta [Eta; Gr. ἦτα]) at the beginning of the name of the Goddess is a vowel.
Nyx (Gr. Νύξ, ΝΥΞ) Pronounced: neeks.
Orphéfs (Orpheus; Gr. Ὀρφεύς, ΟΡΦΕΥΣ) Pronounced: ohr-FEFS
Pærsæphóni - (Persephone; Gr. Περσεφόνη, ΠΕΡΣΕΦΟΝΗ) Pronounced: payr-say-FOH-nee.
Poseidóhn - (Poseidon; Gr. Ποσειδῶν, ΠΟΣΕΙΔΩΝ) Pronounced: poh-see-DOHN, accent on the last syllable; the d (delta) at the beginning of the last syllable is pronounced like a soft th as in this, not like the th in theory.
Rǽa - (Rhea; Gr. Ῥέα, ΡΕΑ) Pronounced: RAY-ah, rolling the R just slightly.
Titánæs (Titans; Gr. Τιτᾶνες, ΤΙΤΑΝΕΣ) Pronounced: tee-TAH-nays or tee-TAH-nehs.
Yaia - (Gaia; Gr. Γαῖα, ΓΑΙΑ. Pronounced: YÆ-ah.
Zefs (Zeus; Gr. Ζεύς, ΖΕΥΣ) Pronounced: zĕfs; the diphthong εύ is pronounced like the ef in left.