The -nen ending
The unmistakable mark of a Finnish surname is -nen, a diminutive ending meaning roughly “little” or “of.” It usually attaches to a nature word: Virtanen (virta, “stream”), Järvinen (järvi, “lake”), Mäkinen (mäki, “hill”), Koskinen (koski, “rapids”). Finland’s landscape of lakes and forests fills its family names.
Two great traditions
Historically, western Finland favoured these house or nature names, while the east used -nen family names passed down the male line. Many Finns only fixed their surnames in the 19th and early 20th centuries, and there was a wave of “Finnicising” Swedish names into Finnish ones.