Oinonen

Oinonen is a Finnish surname. It is relatively common in Finland, primarily concentrated in Eastern Finland. The name's etymology is likely derived from a personal name or a descriptive term related to a geographical feature, though the exact origin is not definitively established. Like many Finnish surnames, it likely evolved from patronymic or descriptive names adopted in the late 19th and early 20th centuries when hereditary surnames became compulsory in Finland. There are no known notable international usages or variations of the name. Data regarding population distribution and frequency can be found in Finnish population registers and genealogical resources.