Loo-ee Vwee-ton
Here's a breakdown:
* Loo-ee: The "ou" in Louis is pronounced like the "oo" in "moon" or "food".
* Vwee-ton: The "ui" in Vuitton is pronounced like the "wee" in "week". The "t" at the end is pronounced, but it's a soft, almost silent "t".
It's important to note that there are slight variations in pronunciation depending on regional accents. However, the pronunciation above is generally considered the most widely accepted and standard pronunciation.