What brand is this?

I earned a pair of sunglasses from my deceased grandma (I'm from Brazil), and this logo:

https://preview.redd.it/0zam80ff0bmb1.jpg?width=2283&format=pjpg&auto=webp&s=4d71ecccb1b04d37a7310cbac353b55f5dfeec60

is right in the front of it. At first I thought they're Gucci, but then when I searched on Google, I found this website that sells vintage eyewear, and finally found the same logo as my glasses!

https://preview.redd.it/9ksxb7f50bmb1.png?width=370&format=png&auto=webp&s=ff13e3b9b2d2bc818c7a3a1a1f3714eada933507

The website says they're from this brand called "Chantel" but I can't find anything about this brand.

I did find a brand called "Chantelle" but nothing on their website point to them being the actual brand.

Did a brand called "Chantel" actually existed? Or is this another brand?