Heiniö

== Finnish == === Etymology === heinä +‎ -iö, adopted and likely created during the Fennicization of surnames in the early 20th century === Pronunciation === IPA(key): /ˈhei̯niø/, [ˈhe̞i̯niø̞] Rhymes: -einiø Syllabification(key): Hei‧ni‧ö Hyphenation(key): Hei‧niö === Proper noun === Heiniö a Finnish surname ==== Declension ==== ==== Statistics ==== Heiniö is the 2734th (tied with 9 other surnames) most common surname in Finland, belonging to 289 individuals, according to August 2025 data from the Digital and Population Data Services Agency of Finland. === References ===