Liittolainen
Liittolainen is a Finnish noun and adjective meaning an ally or a member of an alliance. The word is formed from liitto, meaning alliance or league, and the suffix -lainen, which indicates belonging or relation. As an adjective, liittolainen describes something related to an alliance or belonging to an alliance; as a noun, it refers to a person, state, or organization that participates in an alliance.
In diplomatic and historical contexts, liittolainen is used to denote a partner in a treaty or security
The usage is flexible in modern Finnish as well, where liittolainen can denote contemporary allies in international