I respect it when I hear someone clearly attempting a word they've only seen written

Since we're on the topic there's this historical word that I haven't heard pronounced in English, Alexander the Great had a bunch of generals that were called the Diadochi, I haven't seen this term pronounced in English, but recently I've taken into account the way English speakers pronounce words and I was wondering if the way I'm pronouncing it in English is correct or if I am just wrong.

I've been pronouncing it in an English context as: "Die-a-Dough-key" I'm no linguist so I'm not sure how to write pronunciations sorry if it looks dumb.