Onttonen

== Finnish == === Etymology === Possibly ontto +‎ -nen, through place names with ontto. === Pronunciation === IPA(key): /ˈontːonen/, [ˈo̞n̪t̪ːo̞ne̞n] Rhymes: -ontːonen Syllabification(key): Ont‧to‧nen Hyphenation(key): Ont‧to‧nen === Proper noun === Onttonen a Finnish surname ==== Declension ==== ==== Statistics ==== The surname Onttonen belongs to 101 individuals, according to August 2025 data from the Digital and Population Data Services Agency of Finland.