Tarnanen

Finnish

Possibly from a vernacular form of Russian Дермой (Dermoj) +‎ -nen.^[1]

Tarnanen

Inflection of Tarnanen (Kotus type 38/nainen, no gradation)
nominative		Tarnanen	Tarnaset
genitive		Tarnasen	Tarnasten Tarnasien
partitive		Tarnasta	Tarnasia
illative		Tarnaseen	Tarnasiin
		singular	plural
nominative		Tarnanen	Tarnaset
accusative	nom.	Tarnanen	Tarnaset
accusative	gen.	Tarnasen	Tarnaset
genitive		Tarnasen	Tarnasten Tarnasien
partitive		Tarnasta	Tarnasia
inessive		Tarnasessa	Tarnasissa
elative		Tarnasesta	Tarnasista
illative		Tarnaseen	Tarnasiin
adessive		Tarnasella	Tarnasilla
ablative		Tarnaselta	Tarnasilta
allative		Tarnaselle	Tarnasille
essive		Tarnasena	Tarnasina
translative		Tarnaseksi	Tarnasiksi
abessive		Tarnasetta	Tarnasitta
instructive		—	Tarnasin
comitative		See the possessive forms below.

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

first-person singular possessor
		singular	plural
nominative		Tarnaseni	Tarnaseni
accusative	nom.	Tarnaseni	Tarnaseni
accusative	gen.	Tarnaseni	Tarnaseni
genitive		Tarnaseni	Tarnasteni Tarnasieni
partitive		Tarnastani	Tarnasiani
inessive		Tarnasessani	Tarnasissani
elative		Tarnasestani	Tarnasistani
illative		Tarnaseeni	Tarnasiini
adessive		Tarnasellani	Tarnasillani
ablative		Tarnaseltani	Tarnasiltani
allative		Tarnaselleni	Tarnasilleni
essive		Tarnasenani	Tarnasinani
translative		Tarnasekseni	Tarnasikseni
abessive		Tarnasettani	Tarnasittani
instructive		—	—
comitative		—	Tarnasineni

second-person singular possessor
		singular	plural
nominative		Tarnasesi	Tarnasesi
accusative	nom.	Tarnasesi	Tarnasesi
accusative	gen.	Tarnasesi	Tarnasesi
genitive		Tarnasesi	Tarnastesi Tarnasiesi
partitive		Tarnastasi	Tarnasiasi
inessive		Tarnasessasi	Tarnasissasi
elative		Tarnasestasi	Tarnasistasi
illative		Tarnaseesi	Tarnasiisi
adessive		Tarnasellasi	Tarnasillasi
ablative		Tarnaseltasi	Tarnasiltasi
allative		Tarnasellesi	Tarnasillesi
essive		Tarnasenasi	Tarnasinasi
translative		Tarnaseksesi	Tarnasiksesi
abessive		Tarnasettasi	Tarnasittasi
instructive		—	—
comitative		—	Tarnasinesi

first-person plural possessor
		singular	plural
nominative		Tarnasemme	Tarnasemme
accusative	nom.	Tarnasemme	Tarnasemme
accusative	gen.	Tarnasemme	Tarnasemme
genitive		Tarnasemme	Tarnastemme Tarnasiemme
partitive		Tarnastamme	Tarnasiamme
inessive		Tarnasessamme	Tarnasissamme
elative		Tarnasestamme	Tarnasistamme
illative		Tarnaseemme	Tarnasiimme
adessive		Tarnasellamme	Tarnasillamme
ablative		Tarnaseltamme	Tarnasiltamme
allative		Tarnasellemme	Tarnasillemme
essive		Tarnasenamme	Tarnasinamme
translative		Tarnaseksemme	Tarnasiksemme
abessive		Tarnasettamme	Tarnasittamme
instructive		—	—
comitative		—	Tarnasinemme

second-person plural possessor
		singular	plural
nominative		Tarnasenne	Tarnasenne
accusative	nom.	Tarnasenne	Tarnasenne
accusative	gen.	Tarnasenne	Tarnasenne
genitive		Tarnasenne	Tarnastenne Tarnasienne
partitive		Tarnastanne	Tarnasianne
inessive		Tarnasessanne	Tarnasissanne
elative		Tarnasestanne	Tarnasistanne
illative		Tarnaseenne	Tarnasiinne
adessive		Tarnasellanne	Tarnasillanne
ablative		Tarnaseltanne	Tarnasiltanne
allative		Tarnasellenne	Tarnasillenne
essive		Tarnasenanne	Tarnasinanne
translative		Tarnaseksenne	Tarnasiksenne
abessive		Tarnasettanne	Tarnasittanne
instructive		—	—
comitative		—	Tarnasinenne

third-person possessor
		singular	plural
nominative		Tarnasensa	Tarnasensa
accusative	nom.	Tarnasensa	Tarnasensa
accusative	gen.	Tarnasensa	Tarnasensa
genitive		Tarnasensa	Tarnastensa Tarnasiensa
partitive		Tarnastaan Tarnastansa	Tarnasiaan Tarnasiansa
inessive		Tarnasessaan Tarnasessansa	Tarnasissaan Tarnasissansa
elative		Tarnasestaan Tarnasestansa	Tarnasistaan Tarnasistansa
illative		Tarnaseensa	Tarnasiinsa
adessive		Tarnasellaan Tarnasellansa	Tarnasillaan Tarnasillansa
ablative		Tarnaseltaan Tarnaseltansa	Tarnasiltaan Tarnasiltansa
allative		Tarnaselleen Tarnasellensa	Tarnasilleen Tarnasillensa
essive		Tarnasenaan Tarnasenansa	Tarnasinaan Tarnasinansa
translative		Tarnasekseen Tarnaseksensa	Tarnasikseen Tarnasiksensa
abessive		Tarnasettaan Tarnasettansa	Tarnasittaan Tarnasittansa
instructive		—	—
comitative		—	Tarnasineen Tarnasinensa

Tarnanen is the 3279^th (tied with 14 other surnames) most common surname in Finland, belonging to 237 individuals, according to February 2023 data from the Digital and Population Data Services Agency of Finland.