Ah-guh-NAY-thuh DIK
Here's a breakdown:
* Aganetha: The "a" is pronounced like the "a" in "father," the "e" is silent, and the "th" is pronounced like the "th" in "thin."
* Dyck: The "y" is pronounced like the "i" in "bit" and the "ck" is pronounced like the "k" in "kick."