1. As a name:
* FEE-ahk: This is the most common pronunciation of "Fiach" as a given name, with the emphasis on the first syllable.
2. As a word meaning "debt" or "due"
* Fwee-ahk: The "ch" in this context is pronounced like the "ch" in the English word "loch", with a guttural sound.
3. As a word meaning "a type of Irish harp"
* Fwee-ahk: Again, the "ch" is pronounced like the "ch" in "loch".
It's important to consider the context in which the word is used to determine the correct pronunciation.