The-oh-fan-ee-dis
Here's a breakdown:
* The- is pronounced like the "the" in "the cat"
* oh- is pronounced like the "o" in "go"
* fan- is pronounced like the "fan" in "fan"
* ee- is pronounced like the "ee" in "see"
* dis- is pronounced like the "dis" in "disk"
It's a Greek surname, and the stress is typically on the second-to-last syllable (fan).