Mar-i-tay-ray
The emphasis is on the second syllable, ri.
Here are some key points:
* Mar: Pronounced like "mar" in "march"
* i: Pronounced like the "i" in "machine"
* tay: Pronounced like "tay" in "stay"
* ray: Pronounced like "ray" in "ray of sunshine"
Let me know if you'd like to hear it! I can provide a link to an online audio pronunciation guide.