Sarnia
There is no "official" demonym for someone from Guernsey. The accepted slang term is a "Donkey".
When a team is playing an 'away' game, if their regular home guernsey has colours or a design that clashes with the guernsey of the 'home' team, the away team needs to wear a guernsey of alternate colours or a distinctly different design. This is called the 'clash guernsey'.
Residents of Haiti are called Haitians.
Maine residents are called Mainers!
Maryland's residents are called "Marylanders."
The Guernsey cow is the national animal of Guernsey.
The residents of Epirus are called Epirotes. Although, Epirus is a region of multiple towns. The capital is Ioannina and they are called Gianiotes. Another town is Zagoria and the residents there are called Zagoriani. The beautiful town of Parga where the residents there are called Pargini.
a guernsey is a type of jumper, traditionally hand-made in guernsey
A company called Kraken. They are based in Guernsey
The address of the Guernsey Branch Library is: 108 S. Wyoming Ave., Guernsey, 82214 0607
Rīdzinieki (in Latvian) Рижане (in Russian)