Spanish:
* Kwin-ta-nee-ya
* The "qu" is pronounced like "k"
* The "i" is pronounced like the "ee" in "see"
* The "ll" is pronounced like the "y" in "yellow"
English:
* Kwin-tuh-nil-uh
* The "qu" is pronounced like "k"
* The "i" is pronounced like the "i" in "pin"
* The "ll" is pronounced like the "l" in "hello"
It's best to check the context or ask the speaker how they pronounce it if you're unsure.