Yes. The plural form of a word or surname ending in S or SS uses the form -ES.
This is how you spell it GUINNESS book of world records
The plural way to spell studio is studios.
The plural is cantaloupes.
The plural is roses.
The plural is "emeralds."
I think you mean Guinness.
Guinness
This is how you spell it GUINNESS book of world records
The plural way to spell studio is studios.
The plural is hooves.
The plural is cherries.
The plural is cantaloupes.
The plural is resources.
The plural is "emeralds."
The plural is roses.
The plural is bridges.
Trout is plural