Ruponen

Finnish

Probably from Karelian vernacular forms of Russian Труфан (Trufan) +‎ -nen.^[1]

Ruponen

Inflection of Ruponen (Kotus type 38/nainen, no gradation)
nominative		Ruponen	Ruposet
genitive		Ruposen	Ruposten Ruposien
partitive		Ruposta	Ruposia
illative		Ruposeen	Ruposiin
		singular	plural
nominative		Ruponen	Ruposet
accusative	nom.	Ruponen	Ruposet
accusative	gen.	Ruposen	Ruposet
genitive		Ruposen	Ruposten Ruposien
partitive		Ruposta	Ruposia
inessive		Ruposessa	Ruposissa
elative		Ruposesta	Ruposista
illative		Ruposeen	Ruposiin
adessive		Ruposella	Ruposilla
ablative		Ruposelta	Ruposilta
allative		Ruposelle	Ruposille
essive		Ruposena	Ruposina
translative		Ruposeksi	Ruposiksi
abessive		Ruposetta	Rupositta
instructive		—	Ruposin
comitative		See the possessive forms below.

Possessive forms of Ruponen (Kotus type 38/nainen, no gradation)

first-person singular possessor
		singular	plural
nominative		Ruposeni	Ruposeni
accusative	nom.	Ruposeni	Ruposeni
accusative	gen.	Ruposeni	Ruposeni
genitive		Ruposeni	Ruposteni Ruposieni
partitive		Rupostani	Ruposiani
inessive		Ruposessani	Ruposissani
elative		Ruposestani	Ruposistani
illative		Ruposeeni	Ruposiini
adessive		Ruposellani	Ruposillani
ablative		Ruposeltani	Ruposiltani
allative		Ruposelleni	Ruposilleni
essive		Ruposenani	Ruposinani
translative		Ruposekseni	Ruposikseni
abessive		Ruposettani	Ruposittani
instructive		—	—
comitative		—	Ruposineni

second-person singular possessor
		singular	plural
nominative		Ruposesi	Ruposesi
accusative	nom.	Ruposesi	Ruposesi
accusative	gen.	Ruposesi	Ruposesi
genitive		Ruposesi	Rupostesi Ruposiesi
partitive		Rupostasi	Ruposiasi
inessive		Ruposessasi	Ruposissasi
elative		Ruposestasi	Ruposistasi
illative		Ruposeesi	Ruposiisi
adessive		Ruposellasi	Ruposillasi
ablative		Ruposeltasi	Ruposiltasi
allative		Ruposellesi	Ruposillesi
essive		Ruposenasi	Ruposinasi
translative		Ruposeksesi	Ruposiksesi
abessive		Ruposettasi	Ruposittasi
instructive		—	—
comitative		—	Ruposinesi

first-person plural possessor
		singular	plural
nominative		Ruposemme	Ruposemme
accusative	nom.	Ruposemme	Ruposemme
accusative	gen.	Ruposemme	Ruposemme
genitive		Ruposemme	Rupostemme Ruposiemme
partitive		Rupostamme	Ruposiamme
inessive		Ruposessamme	Ruposissamme
elative		Ruposestamme	Ruposistamme
illative		Ruposeemme	Ruposiimme
adessive		Ruposellamme	Ruposillamme
ablative		Ruposeltamme	Ruposiltamme
allative		Ruposellemme	Ruposillemme
essive		Ruposenamme	Ruposinamme
translative		Ruposeksemme	Ruposiksemme
abessive		Ruposettamme	Ruposittamme
instructive		—	—
comitative		—	Ruposinemme

second-person plural possessor
		singular	plural
nominative		Ruposenne	Ruposenne
accusative	nom.	Ruposenne	Ruposenne
accusative	gen.	Ruposenne	Ruposenne
genitive		Ruposenne	Rupostenne Ruposienne
partitive		Rupostanne	Ruposianne
inessive		Ruposessanne	Ruposissanne
elative		Ruposestanne	Ruposistanne
illative		Ruposeenne	Ruposiinne
adessive		Ruposellanne	Ruposillanne
ablative		Ruposeltanne	Ruposiltanne
allative		Ruposellenne	Ruposillenne
essive		Ruposenanne	Ruposinanne
translative		Ruposeksenne	Ruposiksenne
abessive		Ruposettanne	Ruposittanne
instructive		—	—
comitative		—	Ruposinenne

Ruponen is the 1582^nd (tied with 4 other surnames) most common surname in Finland, belonging to 542 individuals, according to February 2023 data from the Digital and Population Data Services Agency of Finland.