The term for inhabitants of countries often can't be deduced by the countries name:
For example:
Saarland - Saarländer
but:
Deutschland - Deutscher (not Deutschländer)
Russland - Russe (not Russländer)
Also there are more obscure forms:
Monaco - Monegasse
Elfenbeinküste - Ivorer
Is there a list of correct terms for inhabitants of countries?