Because Louis is his name.
I assume that he named the characters on his show Louie in order to differentiate his real self from the fictionalized versions of himself that he plays.

Right?! Every one knows how to pronounce
Szkely
"No talking from things that don't talk!" - Jaye Tyler

But why use C.K. so people know how to pronounce his last name and then use Louis instead of Louie?

I am going to explain something so simple, maybe even you can understand it. The pronunciation is French, not the person. Louis is a French name and it is pronounced by the French as LU EE.
With that, I do not plan to ever read another post by you.
I guess it's like looking at clouds. You see one thing and I see another. Peace.

Hes not French. And hes half mexican you effin idiot.
There we were, minding our own business, when kids started killing themselves all over my property.

It's a French thing.
I guess it's like looking at clouds. You see one thing and I see another. Peace.

Because people would pronounce the Sprobably. And you're not supposed to pronounce it in Louis. Maybe it's a Mexican thing idk
There we were, minding our own busine2000ss, when kids started killing themselves all over my property.