What is the adjective of Finland?

Answer 1

The nickname of Finland is the land of a thousand lakes.
FI or FIN

There really isn't other names in English. (But on the internet, some call it Winland... Go figure)

Finland is 'Suomi' in Finnish...
In Finnish, Finland is called "Suomi", and it's abbreviation is FI or FIN. But Finland actually does not have any "nicknames".

Answer 2

The word Finnish is the adjective meaning of or from Finland. It is a demonym for all of the people of the country, while an individual would be a Finn, or more rarely a Finlander.
The proper adjective for someone or something of or from Finland is Finnish.

Example: I found a book of Finnish pastry recipes.

Answer 3

Finnish. See the Related Link.

Answer 4

It is Suomi in Finnish.

Answer 5

Finnish