Coeur D'alene is a proper-noun French-derived name used for a city in Idaho and a nearby lake. It is pronounced with a silent French-orthography influence, typically yielding two syllables in English usage: “KOR”-dah-LAYN (or similar) depending on speaker. The phrase is often treated as three syllables in English contexts and requires attention to the liaison and French vowel quality in the first word and the final English nasal in the second.
Full pronunciation guide