Piirainen

Piirainen is a Finnish surname. It is derived from the word "piiras," meaning "pie" or "pastry," and the suffix "-inen," which is a common Finnish surname suffix indicating origin or belonging. Thus, the name likely originated as a designation for someone who made or sold pies, or perhaps lived near a place where pies were commonly made or sold. It is a relatively common surname in Finland. Surnames ending in "-inen" are typical of Eastern Finland, specifically the Savo region.