Siponen

Finnish

Sipo- +‎ -nen, of the same origin as Sipi.^[1]

Siponen

Inflection of Siponen (Kotus type 38/nainen, no gradation)
nominative		Siponen	Siposet
genitive		Siposen	Siposten Siposien
partitive		Siposta	Siposia
illative		Siposeen	Siposiin
		singular	plural
nominative		Siponen	Siposet
accusative	nom.	Siponen	Siposet
accusative	gen.	Siposen	Siposet
genitive		Siposen	Siposten Siposien
partitive		Siposta	Siposia
inessive		Siposessa	Siposissa
elative		Siposesta	Siposista
illative		Siposeen	Siposiin
adessive		Siposella	Siposilla
ablative		Siposelta	Siposilta
allative		Siposelle	Siposille
essive		Siposena	Siposina
translative		Siposeksi	Siposiksi
abessive		Siposetta	Sipositta
instructive		—	Siposin
comitative		See the possessive forms below.

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

first-person singular possessor
		singular	plural
nominative		Siposeni	Siposeni
accusative	nom.	Siposeni	Siposeni
accusative	gen.	Siposeni	Siposeni
genitive		Siposeni	Siposteni Siposieni
partitive		Sipostani	Siposiani
inessive		Siposessani	Siposissani
elative		Siposestani	Siposistani
illative		Siposeeni	Siposiini
adessive		Siposellani	Siposillani
ablative		Siposeltani	Siposiltani
allative		Siposelleni	Siposilleni
essive		Siposenani	Siposinani
translative		Siposekseni	Siposikseni
abessive		Siposettani	Siposittani
instructive		—	—
comitative		—	Siposineni

second-person singular possessor
		singular	plural
nominative		Siposesi	Siposesi
accusative	nom.	Siposesi	Siposesi
accusative	gen.	Siposesi	Siposesi
genitive		Siposesi	Sipostesi Siposiesi
partitive		Sipostasi	Siposiasi
inessive		Siposessasi	Siposissasi
elative		Siposestasi	Siposistasi
illative		Siposeesi	Siposiisi
adessive		Siposellasi	Siposillasi
ablative		Siposeltasi	Siposiltasi
allative		Siposellesi	Siposillesi
essive		Siposenasi	Siposinasi
translative		Siposeksesi	Siposiksesi
abessive		Siposettasi	Siposittasi
instructive		—	—
comitative		—	Siposinesi

first-person plural possessor
		singular	plural
nominative		Siposemme	Siposemme
accusative	nom.	Siposemme	Siposemme
accusative	gen.	Siposemme	Siposemme
genitive		Siposemme	Sipostemme Siposiemme
partitive		Sipostamme	Siposiamme
inessive		Siposessamme	Siposissamme
elative		Siposestamme	Siposistamme
illative		Siposeemme	Siposiimme
adessive		Siposellamme	Siposillamme
ablative		Siposeltamme	Siposiltamme
allative		Siposellemme	Siposillemme
essive		Siposenamme	Siposinamme
translative		Siposeksemme	Siposiksemme
abessive		Siposettamme	Siposittamme
instructive		—	—
comitative		—	Siposinemme

second-person plural possessor
		singular	plural
nominative		Siposenne	Siposenne
accusative	nom.	Siposenne	Siposenne
accusative	gen.	Siposenne	Siposenne
genitive		Siposenne	Sipostenne Siposienne
partitive		Sipostanne	Siposianne
inessive		Siposessanne	Siposissanne
elative		Siposestanne	Siposistanne
illative		Siposeenne	Siposiinne
adessive		Siposellanne	Siposillanne
ablative		Siposeltanne	Siposiltanne
allative		Siposellenne	Siposillenne
essive		Siposenanne	Siposinanne
translative		Siposeksenne	Siposiksenne
abessive		Siposettanne	Siposittanne
instructive		—	—
comitative		—	Siposinenne

Siponen is the 947^th (tied with 1 other surname) most common surname in Finland, belonging to 917 individuals, according to February 2023 data from the Digital and Population Data Services Agency of Finland.